Answer:
Step-by-step explanation:
\(A=P(1+r)^t\\ d=12000((1.0475)^5-(1.05)^4\\ \\ d=\$ 547.84\)
Healthy Grocer is offering a special on cases of water bottles, but customers can buy no more than 10 cases at the sale price. The number of water bottles a customer receives is directly proportional to the number of cases purchased. A customer buying 5 cases gets 120 water bottles.
Write a direct variation to represent this situation. Use y to represent the number of water bottles and x to represent the number of cases.
Answer:
y = 24x
Step-by-step explanation:
In a direct variation, we have
output = k * input, with k being a positive number.
Therefore, with the output being the number of water bottles and the input being the number of cases, we have y = kx. We know that the output is y and the input is x because the question states that the number of water bottles (y) is directly proportional to the number of cases (x), so x must be multiplied by something to obtain y.
We have 120 water bottles as one output and 5 cases as its corresponding input.
120 = k(5)
divide both sides by 5 to isolate k
k = 24
y = 24x
Parker has 12 blue marbles. Richard has 34
of the number of blue marbles that Parker has.
Part A
Explain how you know that Parker has more blue marbles than Richard without completing the multiplication.
Enter equal to, greater than, or less than in each box.
Multiplying a whole number by a fraction
less than
1 results in a product that is
the original whole number.
Part B
How many blue marbles does Richard have? Enter your answer in the box.
blue marbles
Ellen O'Brien earns $23.68 per hour. Approximately how many hows must she work for her weekly gross pay to be $900.00 per week? *
Answer:
38.0067567568 hours
Step-by-step explanation:
|2x|=14
|3a|=9
|x–7|=12
|n+6|=1
|1–p|=3
|6–x|=5
|a+9|=2
|k–8|=8
|2m+1|=1
|7–2r|=5
I will vote brainliest to whoever solve this.
x = +7 or -7
a = +3 or -3
x = +19 or -5
n = -5 or -7
p = +4 or -2
x = +11 or +1
a = -11 or -7
k = +16 or 0
m = -1 or 0
r = +6 or +1
: Answer:
Step-by-step explanation:
|3a|=9
a=3
2- |x–7|=12
For the Negative case we'll use -(x-7)
For the Positive case we'll use (x-7)
Solve the Negative Case
-(x-7) = 12
Multiply
-x+7 = 12
rearrange and Add up
-x = 5
Multiply both sides by (-1)
x = -5 (for negative)
Solve the Positive Case
(x-7) = 12
x = 19
Which is the solution for the Positive Case
Wrap up the solution
x=-5 ,x=19
4- |n+6|=1
The Absolute Value term is |n+6|
For the Negative case we'll use -(n+6)
For the Positive case we'll use (n+6)
Solve the Negative Case
-(n+6) = 1
Multiply
-n-6 = 1
-n = 7
Multiply both sides by (-1)
n = -7
Which is the solution for the Negative Case
Solve the Positive Case
(n+6) = 1
n = -5
Which is the solution for the Positive Case
Wrap up the solution
n=-7
n=-5
5- |1–p|=3
The Absolute Value term is |-p+1|
For the Negative case we'll use -(-p+1)
For the Positive case we'll use (-p+1)
Solve the Negative Case
-(-p+1) = 3
Multiply
p-1 = 3
Rearrange and Add up
p = 4
Solve the Positive Case
(-p+1) = 3
Rearrange and Add up
-p = 2
Multiply both sides by (-1)
p = -2
Which is the solution for the Positive Case
Wrap up the solution
p=4 , p=-2
6 - |6–x|=5
The Absolute Value term is |-x+6|
For the Negative case we'll use -(-x+6)
For the Positive case we'll use (-x+6)
Solve the Negative Case
-(-x+6) = 5
Multiply
x-6 = 5
Rearrange and Add up
x = 11
Solve the Positive Case
(-x+6) = 5
Rearrange and Add up
-x = -1
Multiply both sides by (-1)
x = 1
Which is the solution for the Positive Case
Wrap up the solution
x=11 , x=1
7-
The Absolute Value term is |a+9|
For the Negative case we'll use -(a+9)
For the Positive case we'll use (a+9)
Solve the Negative Case
-(a+9) = 2
Multiply
-a-9 = 2
Rearrange and Add up
-a = 11
Multiply both sides by (-1)
a = -11
Which is the solution for the Negative Case
Solve the Positive Case
(a+9) = 2
Rearrange and Add up a = -7
Which is the solution for the Positive Case
Wrap up the solution
a=-11 a=-7
8- |k–8|=8
The Absolute Value term is |k-8|
For the Negative case we'll use -(k-8)
For the Positive case we'll use (k-8)
Solve the Negative Case
-(k-8) = 8
Multiply
-k+8 = 8
Rearrange and Add up
-k = 0
Multiply both sides by (-1)
k = 0
Which is the solution for the Negative Case
Solve the Positive Case
(k-8) = 8
Rearrange and Add up
k = 16
Which is the solution for the Positive Case
Wrap up the solution
k=0 k=16
Solutions on the Number Line
Two solutions were found :
k=16
k=0
9-|2m+1|=1
The Absolute Value term is |2m+1|
For the Negative case we'll use -(2m+1)
For the Positive case we'll use (2m+1)
Solve the Negative Case
-(2m+1) = 1
Multiply
-2m-1 = 1
Rearrange and Add up
-2m = 2
Divide both sides by 2
-m = 1
Multiply both sides by (-1)
m = -1
Which is the solution for the Negative Case
Solve the Positive Case
(2m+1) = 1
Rearrange and Add up
2m = 0
Divide both sides by 2
m = 0
Which is the solution for the Positive Case
Wrap up the solution
m=-1
m=0
Solutions on the Number Line
Two solutions were found :
m=0
m=-1
9- |7–2r|=5
The Absolute Value term is |-2r+7|
For the Negative case we'll use -(-2r+7)
Solve the Negative Case
-(-2r+7) = 5
Multiply
2r-7 = 5
Rearrange and Add up
2r = 12
Divide both sides by 2
r = 6
Solve the Positive Case
(-2r+7) = 5
Rearrange and Add up
-2r = -2
Divide both sides by 2
-r = -1
Multiply both sides by (-1)
r = 1
Which is the solution for the Positive Case
Wrap up the solution
r=6
r=1
two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 109 feet, and ball 2 is dropped from a height of 260 feet. Use the function f(t) -16t^2+h to determine the current height, f(t), of a ball from a height h, over given time t.
When does ball 1 reach the ground? Round to the nearest hundredth
Answer: 5.22 seconds
Step-by-step explanation:
t represents time and y represents the height.
Since we want to know when the ball hits the ground, find t when y = 0
Ball 1 starts at a height of 109 --> h = 109
0 = -16t² + 109
16t² = 109
\(t^2=\dfrac{109}{16}\\\)
\(t=\sqrt{\dfrac{109}{16}}\)
\(t=\dfrac{\sqrt{109}}{2}\)
t = 5.22
=> H = 109
=> 0 = -16t² + 109
=> 16t² = 109
=> t² = 109/16
=> t = 109/2
=> t = 5.22 sec
Therefore, 5.22 second is the answer.
3. Select all expressions that are equivalent to (2n + 6)(n + 3)a. 2(n? + 6n +9)b. 2n? + 6n + 18c. 2n2 + 12n + 18d. 12n + 18e. 2(n + 3)(n + 3)f. 2(n + 3)?
Select all expressions that are equivalent to (2n + 6)(n + 3)
we have
(2n + 6)(n + 3)
apply distributive property
2n^2+6n+6n+18
2n^2+12n+18
Verify each option
option A
2(n^2 + 6n +9)=2n^2+12n+18 -------> is ok
option B
is not correct
option C
is correct
option D
is not correct
option E
2(n + 3)(n + 3)= (2n + 6)(n + 3) ------> is correct
option F
2(n + 3)^2=2(n^2+6n+9)=2n^2+12n+18 -----> is ok
therefore
answers areA, C, E, FCheck whether the ordered pair is a solution of the system of linear equations. Please help!
You have this ordered pair:
\((-2,-5)\)You can identify that its coordinates are:
\(\begin{gathered} x=-2_{} \\ y=-5 \end{gathered}\)Given the first equation:
\(3x-2y=4\)Substitute the value of "x" and the value of "y" into the equation and then evaluate (If the ordered pair is a solution of the System of linear equations, the value on the right side of the equation and the value on the left side must be equal):
\(\begin{gathered} 3(-2)-2(-5)=4 \\ -6+10=4 \\ 4=4(True) \end{gathered}\)Apply the same procedure in the second equation. Then:
\(\begin{gathered} 6x-2y=-2 \\ 6(-2)-2(-5)=-2 \\ -12+10=-2 \\ -2=-2(True) \end{gathered}\)The answer is: The ordered pair is the solution of the System of linear equations.
1. A waste management service attempts to design routes so that each of their trucks pick-up on average four tons of garbage or less. A garbage collector believes, however, that he averages picking up more than four tons of garbage per day and decides to perform a hypothesis test. If the hypothesis test is performed at a 5% significance level and the resulting p-value is 0.04. Your conclusion should be:
2. It has been determined with 95% confidence that the proportion of on-line students at NYU who live in Brooklyn is between 0.73 and 0.77. Determine the sample proportion of on-line NYU students who live in Brooklyn.
3. Assume a normal distribution and use a hypothesis test to test the given claim.
According to city reports, it was found that the mean age of the prison population in the city was 26 years. Marc wants to test the claim that the mean age of the prison population in his city is less than 26 years. He obtains a random sample of 25 prisoners, and finds a mean age of 24.4 years and a standard deviation of 9.2 years. At a significance level of 0.05, what should his conclusion be?
Answer:
1.-Then we p-value indicates that we are in the rejection region we reject H₀
We support the claim of the garbage collector the average picking up more than 4 tn of garbage
2.- p = 75 %
3.-3.-t(s) is in the rejection region we accept H₀ we have not evidence to support Marc´s claim
Step-by-step explanation:
1.- If p-value is 0,04 and significance level α = 5 % or α = 0,05 then p-value < α
Test hypothesis should be ( x the average of garbage)
Null hypothesis H₀ x = 4 Tn
Alternative Hypothesis Hₐ x > 4 Tn
Then alternative hypothesis suggests a one tail-test to the right and
p-value < 0,05
Then we p-value indicates that we are in the rejection region we reject H₀
We support the claim of the garbage collector the average picking up more than 4 tn of garbage
2.- As we are dealing with a normal distribution the CI 95 % is symmetrical with respect to the mean, therefore the proportion of student living in Brooklyn is:
(0,73 + 0,77) /2
p = 0,75 p = 75 %
Test hypothesis:
Null Hypothesis H₀ μ = 26
Alternative Hypothesis Hₐ μ < 26
Alternative hypothesis tells us the test is a one-tail test to the left
Sample size n = 25
Sample mean μ = 24,4
Sample Standard deviation = 9,2
We assume normal distribution, and as n < 30 we use t-student table
with 24 degree of freedom
Significance level is 0,05 and df = 24 we find t (c) in t- student table
t(c) = 1,7109 test to the left t(c) = -1,7109
To calculate t(s)
t(s) = ( 24,4 - 26 ) / 9,2 / √25
t(s) = - 1,6 * 5 / 9,2
t(s) = - 0,87
Comparing t(s) and t(c) we have
t(s) > t(c)
t(s) is in the rejection region we accept H₀ we have not evidence to support Marc´s claim
An infinite geometric series has one and one over five, as its first two terms 11 over5, 1/25, 1/125. What is this sum S of the infinite series
The Sum S of the infinite series is 5/4.
What is geometric Progression?A series of terms is referred to as a geometric progression if each next term is produced by multiplying each previous term by a fixed amount. (GP), whereas the common ratio is the name given to the constant value.
Given:
1, 1/5, 1/25, 1/125
now, let s= 1+ 1/5+ 1/25+ 1/125+ ....
Then, Divide by 5 both side
s/5 = 1/5 + 1/25 + 1/125+ 1/625
Now, add 1 on both side
1+ s/5 = 1 +1/5 + 1/25 + 1/125+ 1/625..
1+ s/5 = s
s - s/5 = 1
4s/5 = 1
s= 5/4
Hence, the Sum S of the infinite series is 5/4.
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A shoe store recorded the price (in dollars) of 175 pairs of women's shoes and 175 pairs of men's shoes. The data collected was used to create the following table.
Answer:
Most of the mens shoes in the data sets cost more than the womens shoes
Step-by-step explanation:
i did this and got it correct
What number is not an integer
3407, 6.729, 0, -46
Answer:
6.729
Step-by-step explanation:
Integers only include plsitive and negative numbers and zero. 6.729 is a number alright but it is a fractional or decimal number.
Determine the x-intercept for 3x + 2y = 14,
A)
(7,0)
B)
(0,7)
C)
2,0)
D)
(0,14
Answer:
X-intercept: \((\frac{14}{3}, 0)\).
Y-intercept: (0, 7) ⇒ Option B.
Step-by-step explanation:
I'm not certain whether the question asks for either the x-intercept or the y-intercept, but I will provide the answers for both since none of the given options matches the coordinates of the x-intercept.
X-intercept:The x-intercept is the point on the graph where it crosses the x-axis, with coordinates of (a, 0). The x-intercept is the value of x when y = 0.
Given the linear equation in standard form, 3x + 2y = 14, set y = 0 to solve for the x-intercept:
3x + 2y = 14
3x + 2(0) = 14
3x + 0 = 14
3x = 14
Divide both sides by 3 to solve for x:
\(\frac{3x}{3} = \frac{14}{3}\)
\(x = \frac{14}{3}\)
Therefore, the x-intercept is \((\frac{14}{3}, 0)\). None of the given option matches the value of the x-intercept.
Y-intercept:The y-intercept is the point on the graph where it crosses the y-axis, and has coordinates of (0, b). It is the value of y when x = 0.
Set x = 0, and substitute into the given equation.
3x + 2y = 14
3(0) + 2y = 14
0 + 2y = 14
2y = 14
Divide both sides by 2 to solve for y:
\(\frac{2y}{2} = \frac{14}{2}\)
y = 7
Therefore, the y-intercept is (0, 7), which matches Option B.
Cara used the order of operations to evaluate the expression below.
What was Cara’s first error?
Cara did not evaluate 7-13.
Cara did not evaluate (Negative 4) squared.
Cara subtracted 2 from 6 incorrectly.
Cara multiplied 2 and 4 incorrectly.
Cara's first error was not 7 - 13, leading to an incorrect result of -32.
Cara's first error was that she did not evaluate (Negative 4) squared.
The expression in question is not provided, so let's assume it is "6 - 2 × (-4)² + 7 - 13".
According to the order of operations (PEMDAS/BODMAS), we evaluate operations inside parentheses first, then exponents, followed by multiplication and division from left to right, and finally addition and subtraction from left to right.
To evaluate the expression correctly, we follow the order of operations:
Evaluate the exponent (-4)².
Since (-4) squared is positive, (-4)² = 16.
Multiply 2 and 16.
2 × 16 = 32.
Evaluate the addition and subtraction from left to right.
6 - 32 + 7 - 13.
At this point, we see that Cara did not evaluate 7 - 13.
Therefore, her first error was not evaluating the subtraction correctly.
Continuing the evaluation:
6 - 32 + 7 - 13 = -32.
So, Cara's first error was not evaluating 7 - 13, leading to an incorrect result of -32.
It's important to carefully follow the order of operations to ensure accurate evaluations of mathematical expressions.
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A
-pound bag of Kitty Kibbles is
. An
-pound bag of Feline Flavor is
. Which statement about the unit prices is true?
Feline Flavor has a higher unit price of
/pound.
Kitty Kibbles has a higher unit price of
/pound.
Kitty Kibbles has a higher unit price of
/pound.
Feline Flavor has a higher unit price of
/pound.
The statement about the unit prices which is true is Kitty Kibbles has a lower unit price of $1.30/pound.
The correct answer choice is option D.
How to solve unit prices?Cost of 16-pound bag of Kitty Kibbles = $20.80
Unit price of kitty kibbles = Price / number of pounds
= $20.80 / 16
= $1.30 per pound.
Cost of 8-pound bag of Feline flavor = $11.20
Unit price of feline flavor = Price / number of pounds
= $11.20 / 8
= $1.40 per pound
Ultimately, the unit price of kitty kibbles and feline flavor is $1.30 and $1.40 respectively.
Complete question:
A 16-pound bag of Kitty Kibbles is $20.80. An 8-pound bag of Feline Flavor is $11.20. Which statement about the unit prices is true?
A. Feline Flavor has a lower unit price of $1.40/pound.
B. Feline Flavor has a lower unit price of $1.30/pound.
C. Kitty Kibbles has a lower unit price of $1.40/pound.
D. Kitty Kibbles has a lower unit price of $1.30/pound.
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please help me I would really appreciate it this really affects my grade need the answer the ASAP
Answer:
27/6, 4 3/6, or simplified version 4 1/2
Step-by-step explanation:
Always convert the mixed numbers into an improper fraction before you solve, this makes it easier to solve.
2 4/6 = 16/6
1 5/6 = 11/6
3 4/6 = 22/6
Now we solve. Remember, you do NOT add the denominator, leave it as 6 not 12. You only add the numerator.
16/6 + 11/6 = 27/6, 4 3/6 or simplified as 4 1/2
22/6 + 5/6 = The same as above.
A cylinder has a radius of 4 millimeters. Its volume is 200.96 cubic millimeters. What is the height of the cylinder?
Answer:
3.999 millimeters.
Step-by-step explanation:
To find the height of the cylinder, we can use the formula for the volume of a cylinder:
V = πr²h
Given that the radius (r) of the cylinder is 4 millimeters and the volume (V) is 200.96 cubic millimeters, we can substitute these values into the formula and solve for the height (h).
200.96 = π(4²)h
200.96 = 16πh
To solve for h, we can divide both sides of the equation by 16π:
200.96 / (16π) = h
Using a calculator, we can calculate the approximate value of h:
h ≈ 200.96 / (16 × 3.14159)
h ≈ 3.999
Therefore, the height of the cylinder is approximately 3.999 millimeters.
Let be independent random variables with the common distribution function F and suppose they are independent of a geometric random variable with parameter p. Let M = max(x1,....,xN) (a) Find P{M<} by conditioning on N (b) Find P(M1} (d) Use (b) and (c) to rederive the probability you found in (a).
suppose they are independent of a geometric random variable with parameter p. Let M = max(x1,....,xN) (a) Find P{M<} by conditioning on N is nλe^(-nλx)
Given fx (x) = λe^λx
Fx (x) = 1 – e^-λx x…0
To find distribution of Min (X1,….Xn)
By applying the equation
fx1 (x) = [n! / (n – j)! (j – 1)!][F(x)]^j-1[1-F(x)]^n-j f(x)
For minimum j = 1
[Min (X1,…Xn)] = [n!/(n-1)!0!][F(x)]^0[1-(1-e^-λx)]^n-1λe^-λx
= ne^[(n-1) λx] λe^(λx)
= nλe^(-λx[1+n-1])
= nλe^(-nλx)
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A ball is thrown up in the air from the top of a building. The function h(t) = -5t²+10t + 80 models the height of the ball, in feet, after t seconds. Graph this function.
What is the maximum height reached by the ball?
Answer:
Step-by-step explanation:
h(t)=-5t²+10t+80=-5(t²-2t+1-1)+80
=-5(t²+2t+1)+5+80
=-5(t-1)²+85
maximum height reached=85 ft
Write a function for the sinusoid (the curve).
У
(2,5)
14
(1, -1)
3
1
Choose...
3 cos x + 2
The function is f(x) = 3 sin x
3 sin x
3 cos x
2 X
The equation of the sinusoid function is:
3 Sin πx + 2.
Let's analyze the given options to find the correct equation:
a. 3 Cos πx + 2:
This option is a cosine function with a vertical shift of 2, but it does not have the correct amplitude or period. Therefore, it is not the correct equation.
b. 3 Sin x: This option is a sine function with the correct amplitude, but it does not have the correct vertical shift or period. Therefore, it is not the correct equation.
c. 3 Sin πx + 2: This option is a sine function with the correct amplitude and vertical shift. Let's check if it has the correct period:
To determine if the period is correct, we need to calculate the x-values when the function repeats itself.
In this case, we need to find x-values such that sin(πx) = 0, since the function will reach its maximum and minimum points again at those x-values.
sin(πx) = 0 when πx = 0, π, 2π, 3π, ...
Solving for x, we have:
πx = 0 ⟹ x = 0
πx = π ⟹ x = 1
πx = 2π ⟹ x = 2
πx = 3π ⟹ x = 3
From this, we can see that the function repeats itself every integer value of x, which matches the given information.
Therefore, option (c) is the correct equation: 3 Sin πx + 2.
Option (d) 3 Cos x does not have the correct vertical shift or period, so it is not the correct equation.
Hence, the equation of the sinusoid function is:
3 Sin πx + 2.
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f(x) = x² - 4 and g(x)= x^2 + 1 are sketched 10.1.2 Determine the length of DB .
x⁴ - 8x² + 17 is the function that represents the fog(x).
To find fog(x), we first need to find g(f(x)), which means we need to substitute the expression for f(x) into the expression for g(x):
g(f(x)) = g(x² - 4)
Now, we can substitute the expression for g(x) into the above expression:
g(f(x)) = (x² - 4)² + 1
Expanding the squared term, we get:
g(f(x)) = x⁴ - 8x² + 17
Therefore, fog(x) = g(f(x)) = x⁴ - 8x² + 17.
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Complete question:
f(x) = x² - 4 and g(x)= x^2 + 1 find fog(x).
Annual students fees at university rose from about $6,000 in 2000 to about $15,000 in 2014. Find the percent increase
Answer: 150 percent.
Step-by-step explanation:
The problem asks for the percent increase in the annual student fees from 2000 to 2014.
First, we need to know how to find a percent increase.
The percentage change formula is
(Increase in amount) / (Original amount) * 100
Using this formula, we can solve this problem.
Since the fee in 2000 was $6000 and the fee in 2014 was $15000, we can find the increase in fees.
Increase in fees = 15000-6000 == 9000
Next, let's use the formula to find the answer.
Percentage Increase = (Increase in fees) / (Original amount) * 100
= 9000 / 6000 * 100
= 150
Therefore, the answer is 150 percent.
The fraction of PKR 1 is 50 paisas
The fraction that represents the rate between PKR and Paisas is given as follows:
1/50.
What is a fraction?A fraction is a numerical representation of the division of the two terms x and y, as follows:
Fraction = x/y.
As the rate is PKR 1 = 50 paisas, we have that the fraction that represents the rate between PKR and Paisas is given as follows:
1/50.
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Help I need done quick
Answer: 160
Step-by-step explanation:
I divided 144/9 to see how many students are their per 10% of the 90% of students and got the answer 16. I then added 16 as the other missing 10% to 144 and got the answer 160.
Dorothy Wagner is currently selling 40 "I ♥ Calculus" T-shirts per day, but sales are dropping at a rate of 4 per day. She is currently charging $7 per T-shirt, but to compensate for dwindling sales, she is increasing the unit price by $1 per day. How fast, and in what direction, is her daily revenue currently changing?
The rate at which her daily revenue is currently changing and the direction of the change is; Her revenue is currently increasing at $12 per day
What is the rate of change of a function?The rate of change of a function is the rate at which the output of the function changes per unit change in the input of the function.
Let x represent the number of days, therefore;
The number of T-shirts Dorothy sells, y = 40 - 4·x
The price at which she sells the T-shirts = 7 + x
Therefore, Dorothy's daily revenue, R(x) = (40 - 4·x) × (7 + x) = 12·x - 4·x² + 280
The rate of change of her daily revenue can be obtained from the derivative of the revenue function as follows;
The rate at which her daily revenue is therefore;
R'(x) = d(R(x))/dx = 12 - 8·x
The rate at which her revenue is changing currently can be obtained from the rate function by plugging in x = 0, as follows;
R'(0) = 12 - 8×0 = 12
Her revenue is changing at a rate of $+12 per day.
The positive value of the rate, 12, indicates that her revenue is increasing at $12 per day
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Steve says to find the difference in temperature between 7 AM and
12 PM Wednesday, he can use a number line. He says because one
temperature is negative and the other is positive, he can add together their
distances from 0.
Kelly says that she can find the change by subtracting -5.1 from the temperature
at 12 PM on Wednesday.
Who is correct? Use the drop-down menus to explain your reasoning and find the
change in temperature.
and the distance from 0 to the Wednesday 12 PM temperature is 2.5
Steve is correct. Steve can find the difference in temperature between 7 AM and 12 PM on Wednesday by adding the distances from 0.
By using a number line, Steve can find the difference in temperature between 7 AM and 12 PM on Wednesday by adding the distances from 0. One temperature is negative and the other is positive, but by adding their distances, he can find the difference. Kelly's method of subtracting -5.1 from the temperature at 12 PM on Wednesday is not necessarily incorrect, but it does not give the exact difference in temperature between the two times. Therefore, using Steve's method, the change in temperature would be the sum of the distance from 0 to the temperature at 7 AM (which is 2.5) and the distance from 0 to the temperature at 12 PM (which is also 2.5), resulting in a difference of 5 degrees.
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Find x-intercept of the line
4x +11y=20
Answer:
x=5
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
Desmos Graphing Calculator
I have no idea how to do this
sqrt(x+4)=2-x
help me pleaseeeeeee
Answer:
x = 0
Step-by-step explanation:
\(\sqrt{x+4}\) = 2 - x ( square both sides to clear the radical )
x + 4 = (2 - x)² ← expand using FOIL
x + 4 = 4 - 4x + x² ( subtract x + 4 from both sides )
0 = x² - 5x ← factor out x from each term
0 = x(x - 5)
equate each factor to zero and solve for x
x = 0
x - 5 = 0 ⇒ x = 5
As a check
substitute these values into the equation and if both sides are equal then they are the solutions
x = 0
left side = \(\sqrt{0+4}\) = \(\sqrt{4}\) = 2
right side = 2 - 0 = 2
then x = 0 is a solution
x = 5
left side = \(\sqrt{5+4}\) = \(\sqrt{9}\) = 3
right side = 2 - 5 = - 3 ≠ 3
then x = 5 is an extraneous solution
Answer: \(x=\Large\boxed{0}\)
Step-by-step explanation:
Given expression
\(\sqrt{x+4} =2-x\)
Square both sides of the equation
\(\sqrt{x+4}^2 =(2-x)^2\)
\(x+4=4-4x+x^2\)
Subtract x on both sides
\(x+4-x=4-4x+x^2-x\)
\(4=x^2-5x+4\)
Subtract 4 on both sides
\(4-4=x^2-5x+4-4\)
\(0=x^2-5x\)
Factorize the quadratic expression
\(0=x(x-5)\)
\(x=\Large\boxed{0} \text{ or }x=5~(reject)\text{ }\)
Check the answer
\(\text{When x = 0:}\)
\(\sqrt{(0)+4} =2-(0)\)
\(\sqrt{4}=2\)
\(2=2\) \(\boxed{TRUE}\)
\(\text{When x = 5:}\)
\(\sqrt{(5)+4} =2-(5)\)
\(\sqrt{9}=-3\)
\(3\neq -3\) \(\boxed{FALSE}\)
Hope this helps!! :)
Please let me know if you have any questions
A rectangular window is 48 in long and 24 in wide. Amywould like to buy a screen for the window. The cost ofthe screen is based on the number of square feet thescreen is. Use the facts to find the area of the window in square feet.
Since it is a rectangular window, we can find its area using the following formula:
Let's make a conversion first:
48in = 4ft
24in = 2ft
\(\begin{gathered} A=w\cdot l \\ \text{Where:} \\ w=\text{width}=4ft \\ l=\text{long}=2ft \\ A=4\cdot2=8ft^2 \end{gathered}\)use set notation and the listing method to describe the set of all counting numbers less than or equal to 9
The list of counting numbers less than or equal to 9, is:
\(1,2,3,4,5,6,7,8,9\)We can write it in set notation with the listing method as:
\(\lbrace1,2,3,4,5,6,7,8,9\rbrace\)A descriptional method using set notation is also possible. Let x be a counting number, then this set is given by:
\(\lbrace x\in\N|x\le9\rbrace\)