Answer:
80 percent decrease
Step-by-step explanation:
80% of 50 = 40 and 50 - 40 = 10
Answer:
It decreases 80%
Step-by-step explanation:
If the 50g one is 100%, and the 10g one is a fraction of that, find out what 10/50 is as a percent.
10/50= 20%
Because this is the remaining mass, the other 80% has been deducted meaning that the mass of the large container has decreased 80% to get to the mass of the smaller one.
Rita wants to paint the area shown at the right. What is the
area that she needs to cover?
The area that she needs to cover, which is the area of the trapezoid, is given as follows:
A = 144 m².
How to obtain the area of a trapezoid?The area of a trapezoid is given by half the sum of the bases, multiplied by the height.
The parameters of this problem are given as follows:
Bases of 9m and 15m.Height of 12 m.Hence the area of the trapezoid is given as follows:
A = 0.5 x 12 x (9 + 15)
A = 6 x 24
A = 144 m².
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Help me please. thank you if you do.
Answer:
X=13
Step-by-step explanation:
Because vertical angles exist opposite to each other formed by intersecting lines, the angles would be congruent to each other. Meaning angle A is congruent to angle B.
Step 1: 8x-12=6x+14
Step 2: 2x-12=14
Step 3: 2x=26
Step 4: x=13
Are 5/9 and 25/45 equivalent? Explain your answer
Answer:
yes they are equivalent
Step-by-step explanation:
25/45÷5/5=5/9
and 5/9×5/5=25/45
hope this answer helps u...
Answer:
Yes.
Step-by-step explanation:
5/9 is equivalent to 25/45. We can find this out by multiplying both the numerator and the denominator by 5 as 9 x 5 = 45.
So the result is; 5/9 = (5 x 5)/ 9 x 5 = 25/ 45
Question 7
Jorge earned 91, 84, 87 on his first three out of four Algebra tests. He wants to get an
average of 90 in the class. What should he make on his last test to achieve this goal?
To earn an average score of 90, the score on the fourth test needs to be 98.
What is average?The core value of a set of data is expressed mathematically as the average of a list of data. It is defined mathematically as the ratio between the total number of units in the list and the sum of all the data. The term "mean" in statistics also refers to the average of a particular set of numerical data.
Given the score of the first three tests as:
91, 84, 87.
The average is given by the following formula:
Average = Sum of scores ÷ total number of tests
Let us suppose the score of fourth test as x.
Given that A = 90:
90 = (91 + 84 + 87 + x) ÷ 4
x = 98
Hence, the score on the fourth test must be equal to 98, to get an average score of 90.
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James and Tom both go for a drive and return home.
The travel graphs show information about their journeys.
How much shorter in km was the distance Tom drove?
Distance is the number of units between two points.
Tom's distance was 15 km shorter than James's
How to interpret the graphsFrom Tom's graph, the highest distance from home is 10 kmFrom Jame's graph, the highest distance from home is 25 kmCalculate the difference between these distances
\(d = 25km -10km\)
Evaluate the differences
\(d = 15km\)
Hence, Tom's distance was 15 km shorter than James's
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NEED HELP WILL GIVE BRAINLIEST AND WILL RATE. Show work and I only need #1
The end behavior of f(x) is described as follows:
As x -> -∞, f(x) -> ∞.As x -> ∞, f(x) -> 0.How to obtain the end behavior of a function?The end behavior of a function is given by the limit of the function is the input x goes to either negative infinity or positive infinity.
The function for this problem is given as follows:
f(x) = 4(5/7)^x.
It is an exponential function with base with absolute value less than 1, hence the end behavior is given as follows:
Increases to the left of the graph -> As x -> -∞, f(x) -> ∞.Approaches the horizontal asymptote y = 0 at the right of the graph -> As x -> ∞, f(x) -> 0.More can be learned about the end behavior of a function at brainly.com/question/1365136
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The darkness of the print is measured quantitatively using an index. If the index is greater than or
equal to 2.0 then the darkness is acceptable. Anything less than 2.0 means the print is too light and
not acceptable. Assume that the machines print at an average darkness of 2.2 with a standard
deviation of 0.20.
(a) What percentage of printing jobs will be acceptable? (4)
(b) If the mean cannot be adjusted, but the standard deviation can, what must be the new standard
deviation such that a minimum of 95% of jobs will be acceptable?
84.13% of the printing jobs will be acceptable.
The new standard deviation required to achieve a minimum of 95% of jobs acceptable is 0.121.
The darkness of the print is measured quantitatively using an index. If the index is greater than or equal to 2.0 then the darkness is acceptable. Anything less than 2.0 means the print is too light and not acceptable. The machines print at an average darkness of 2.2 with a standard deviation of 0.20.
The mean of the darkness of the print is µ = 2.2 and the standard deviation is σ = 0.20.Therefore, the z-score can be calculated as; `z = (x - µ) / σ`.The index required for acceptable prints is 2.0. Thus, the percentage of prints that are acceptable can be calculated as follows;P(X ≥ 2.0) = P((X - µ)/σ ≥ (2.0 - 2.2) / 0.20)P(Z ≥ -1) = 1 - P(Z < -1)Using the standard normal table, P(Z < -1) = 0.1587P(Z ≥ -1) = 1 - 0.1587= 0.8413.
To find the new standard deviation, we can use the z-score formula.z = (x - µ) / σz = (2.0 - 2.2) / σz = -1Therefore, P(X ≥ 2.0) = 0.95P(Z ≥ -1) = 0.95P(Z < -1) = 0.05Using the standard normal table, the z-score value of -1.645 corresponds to a cumulative probability of 0.05. Hence,z = (2.0 - 2.2) / σ = -1.645σ = (2.0 - 2.2) / -1.645= 0.121.
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1. In an arithmetic sequence, the first term is -2, the fourth term is 16, and the n-th term is 11,998
(a) Find the common difference d
(b) Find the value of n.
pls help...
Answer:
see explanation
Step-by-step explanation:
The n th term of an arithmetic sequence is
\(a_{n}\) = a₁ + (n - 1)d
(a)
Given a₁ = - 2 and a₄ = 16, then
a₁ + 3d = 16 , that is
- 2 + 3d = 16 ( add 2 to both sides )
3d = 18 ( divide both sides by 3 )
d = 6
--------------
(b)
Given
\(a_{n}\) = 11998 , then
a₁ + (n - 1)d = 11998 , that is
- 2 + 6(n - 1) = 11998 ( add 2 to both sides )
6(n - 1) = 12000 ( divide both sides by 6 )
n - 1 = 2000 ( add 1 to both sides )
n = 2001
------------------
In the figure below, mZ2-66". Find m21, mZ3, and mZ4
*
m23-
#24-
%
The value of the angles in the figure are:
m∠1 = 114°
m∠3 = 114°
m∠4 = 66°
How to find m∠1, m∠3 and m∠4 in the figure?To answer the question, we need some angle geometry knowledge:
We have:
m∠2 = 66°
Thus, we can find the angles in the figure as follow:
m∠1 = 180° - 66° (sum of angles on a straight line is 180°)
m∠1 = 114°
m∠3 = m∠1 (vertically opposite angles are equal)
m∠3 = 114°
m∠4 = m∠2 (vertically opposite angles are equal)
m∠4 = 66°
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Suppose that 40% of cars in your area are manufactured in the U.S., 30% in Japan, 10% in Germany, and 20% in other
countries. Determine the following probabilities.
a. a car selected at random is made in Germany or Japan
b. a car selected at random is not US-made
c. two cars are selected at random, both are from Japan
Complete your work in the space provided or upload a file that can display math symbols if your work requires it. Include
your calculations in your answer.
Answer:
A) The probability that a randomly chosen car is made in Germany or Japan is 40%.
B) The probability that a car chosen at random is not made in the United States is 60%.
C) The probability that two randomly chosen cars are both from Japan is 9%.
Step-by-step explanation:
Supposing that 40% of cars in my area are manufactured in the US, 30% in Japan, 10% in Germany, and 20% in other countries, to determine the probabilities that a car selected at random is made in Germany or Japan, a car selected at random is not US-made and two cars are selected at random, both are from Japan, the following calculations must be performed:
A)
(30 + 10) / 100 = X
40/100 = X
0.4 = X
Therefore, the probability that a randomly chosen car is made in Germany or Japan is 40%.
B)
(30 + 10 + 20) / 100 = X
60/100 = X
0.6 = X
Therefore, the probability that a car chosen at random is not made in the United States is 60%.
C)
10/30 x 10/30 = X
0.3 x 0.3 = X
0.09 = X
Therefore, the probability that two randomly chosen cars are both from Japan is 9%.
the sum of all even numbers in 3 digit
it will mark as topper
Answer
sum of all 3 digit even number = 247050
The series is 100 + 102 + 104 + .... + 998
which by using formula Sn = N/2 ( a + an)
where N = number of terms
a = first term = 100
an = last term = 998
A city has a population of 270,000 people. Suppose that each year the population grows by 3.5 . What will the population be after 13 years? Use the calculator provided and round your answer to the nearest whole number.
The population of the city after 13 years with growth rate of 3.5% per year is equal to 422268 people.
Population of the people in the city = 270,000
Population grow by 3.5% per year
Time = 13 years
We can use the formula for exponential growth,
P = P₀(1 + r)ⁿ
where P₀ is the initial population,
r is the annual growth rate as a decimal,
n is the number of years,
and P is the final population.
Using the values given in the problem, we have,
P₀ = 270,000
since the annual growth rate is 3.5%
r = 0.035
Since we want to know the population after 13 years.
n = 13
Plugging these values into the formula, we get,
P = 270,000(1 + 0.035)¹³
= 270,000 (1.56395 )
≈ 422268.1
Rounding to the nearest whole number, the population after 13 years will be approximately 422268 people.
Therefore, the population of the city after 13 years is equal to 422268 people.
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John is a software salesperson. His base salary is $2300 and he makes $70 more for every copy of English is Fun he sells. His total pay, P (in dollars), after selling c copies is given by the following.
P=70c+2300
(a) If john’s total pay is $4750, how many copies did he sell?
(b) What is john’s total pay if he sells 25 copies?
Answer:
A - 35 copies
B - $4050
Step-by-step explanation:
A-
2300 + 70c = 4750
70c = 4750 - 2300
70c = 2450
c = 35
He sold 35 copies
B-
P = 2300 + 70(25)
P = 2300 + 1750
P = $4050
Total if he sold 25 copies: $4050
Simplify the following expressions by using the properties of exponents. Assume none of the denominators is zero.
a^3 (2a^2 + 4bc^4)^ 0
The simplified form of the expression is a³ which is calculated by using the properties of exponents.
Exponentiation is a mathematical operation that involves the base number (b) and the exponent (or power) number (n), and is represented as bⁿ. Its pronunciation is "b (raised) to the (power of) n." Exponentiation corresponds to repeated base multiplication where n is a positive integer; so, bⁿ is the result of multiplying n bases.
Typically, a superscript to the right of the base indicates the exponent. Then, bⁿ is referred to as "b raised to the nth power," "b (raised) to the power of n," "the nth power of b," "b to the nth power," or, most succinctly, "b to the nth."
The given expression is a³(2a² + 4bc⁴)⁰.
From the properties of exponents we know that:
a⁰ = 1
Therefore the value of the part of the expression (2a² + 4bc⁴)⁰ is 1
Therefore the total value of the exponential expression is a³
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PLEASE HELP!!
In the diagram below, BC is the diameter of circle A.
Point D, which is unique from points B and C, is
plotted on circle A. Which statement must always be
true?
The statement triangle BCD is a right angle triangle because an angle in a semicircle is a right angle option 1 is correct.
What is a circle?It is defined as the combination of points that, and every point has an equal distance from a fixed point (called the center of a circle).
We have a diagram shown in the picture.
BC is the diameter of the circle.
Point B and Point C lies on the circle.
If a point D, which is unique from points B and C, is plotted on circle A.
Then the right angle triangle will be formed because an angle in a semicircle is a right angle.
Thus, the statement triangle BCD is a right angle triangle because an angle in a semicircle is a right angle option 1 is correct.
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Ahmad and Dante wash cars in the neighborhood and charge $5 per car. Last year, they worked very hard and were able to wash 450 cars in the year. They have done a little market research and found that for every $0.20 that the price is reduced, they can get 50 more customers.
1. b. If they decreased the price by $0.20 how much would they earn?
The amount earned if they decreased the price by $0.20 will be $2400.
How to calculate the value?From the information, they found that for every $0.20 that the price is reduced, they can get 50 more customers.
The amount earned if they decreased the price by $0.20 will be:
= ($5 - $0.20) × (450 + 50)
= $4.80 × 500
= $2400
Therefore, the amount is $2400.
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How do I simplify 25.3(2.4)
Answer:
60.72
Step-by-step explanation:
you multiply 25.3 by 2.4
Find the equation of a parabola with focus (3, 4) and directrix y = 1.
The equation of the parabola with focus (3, 4) and directrix y = 1 is \(x^2 - 6x - 12y + 57 = 0.\)
To find the equation of a parabola with a given focus and directrix, we can use the standard form of the equation of a parabola:
\(4p(y - k) = (x - h)^2\)
where (h, k) represents the coordinates of the vertex, and p is the distance between the vertex and the focus or directrix.
In this case, the focus is given as (3, 4), which means the vertex of the parabola will also be located at (3, 4).
The directrix is given as y = 1.
First, let's find the value of p, which is the distance between the vertex and the focus (or the vertex and the directrix). In this case, p will be the distance between the vertex (3, 4) and the directrix y = 1.
Since the directrix is a horizontal line, the distance between the vertex and the directrix is the vertical distance, which is |4 - 1| = 3.
Now that we have the value of p, we can substitute it into the equation:
\(4p(y - k) = (x - h)^2\)
Plugging in the values (h, k) = (3, 4) and p = 3, we get:
\(4(3)(y - 4) = (x - 3)^2\)
Simplifying further:
\(12(y - 4) = (x - 3)^2\)
Expanding the equation:
\(12y - 48 = x^2 - 6x + 9\)
Bringing all terms to one side:
\(x^2 - 6x - 12y + 57 = 0\)
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I am lost on this question i found both but it keeps on telling me i am incorrect
Answer:
I have completed the answers and attached them to the explanation.
Step-by-step explanation:
Answer:
Step-by-step explanation:
The question asks for a subtraction expression:
length is always a positive number so bigger number first here.
OB = 4-(-1) >only moves in x direction so subtract x's
AB = 4-(-2) >only moves in y direction so subtract y's
Graph the data in the table
A four-ounce serving of Campbell's Pork & Beans contains 5 grams of protein and 21 grams of carbohydrates A typical slice of "lite" rye bread contains 4 grams of protein and 12 grams of carbohydrates.
(a) I am planning a meal of "beans-on-toast" and I want it to supply 20 grams of protein and 80 grams of carbohy- drates. How should I prepare my meal?
(b)If I require A grams of protein and B grams of carbohy- drates, give a formula that tells me how many slices of bread and how many servings of Pork & Beans to use.
(a) To meet the desired 20g protein and 80g carbohydrate intake, prepare 4 servings of Pork & Beans and combine with 15 slices of "lite" rye bread.
(b) Bread: A/4 slices, Beans: B/21 - (A/4) * (12/21) servings.
(a) To prepare a meal of "beans-on-toast" that supplies 20 grams of protein and 80 grams of carbohydrates, you can use the following combination:
- Servings of Campbell's Pork & Beans: 4 servings.
- Slices of "lite" rye bread: 15 slices.
By using 4 servings of Campbell's Pork & Beans, you will obtain a total of 20 grams of protein (5 grams per serving) and 84 grams of carbohydrates (21 grams per serving).
Combining this with 15 slices of "lite" rye bread will contribute an additional 60 grams of carbohydrates (12 grams per slice) and 4 grams of protein (4 grams per slice). Thus, your meal will meet the desired nutritional requirements of 20 grams of protein and 80 grams of carbohydrates.
(b) The formula to determine the number of slices of bread and servings of Pork & Beans needed to meet specific protein and carbohydrate requirements is as follows:
- Number of slices of bread (Bread): A divided by 4.
- Number of servings of Pork & Beans (Beans): (B divided by 21) minus ((A divided by 4) multiplied by (12 divided by 21)).
Using this formula, you can calculate the appropriate quantities of bread and beans based on the desired protein (A) and carbohydrate (B) values.
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Expand ; 3(1-x/2)^2
Answer:
\(3 {( \frac{1 - x}{2}) }^{2} = 3 \times {(1 - x)}^{2} \div {2}^{2} \\ =3 \times (1 - 2 \times 1 \times x + {x}^{2}) \div 4 \\ = 3 \times (1 - 2x + {x}^{2} ) \div 4 \\ = \frac{3}{4} (1 - 2x + {x}^{2})\)
\( \bold \pink{ \underline{hope \: it \: helps}}\)
You are the only bidder in an online auction of a nintendo wii system with games and accessories. The seller has set a secret reserve price (the minimum price she is willing to accept for the wii). Assume that the secret reserve price x is uniformally distributed between $240 and $320.1) Height of the probability density function f(x) varies with x as follows (round to four decimal places). 240 ≥ x ≥ 3202) You enter a bid of $280 for the wii. What is the probability that you'll win the auction?3) What is the mean secret reserve price?4) What is the standard deviation of the above question?5) You enter your bid of $280 and see that the seller's reserve price has not been met. You enter a new bit of $300. Now what is the probability that you'll win the auction?
Answer:
1. 1/80 = 0.0125
2. 1/2 = 0.5
3. 280
4. 23.09
5. 1/2 = 0.5
Step-by-step explanation:
1. height of probability density function
\(\frac{1}{320-240} \\= \frac{1}{80}\)
= 0.0125
2. probabilty that you will win the auction given a bid of 280
= \(\frac{280-240}{320-240} \\=\frac{40}{80} \\= \frac{1}{2}\)
3. mean secret service price
\(\frac{320+240}{2} \\=\frac{560}{2} \\= 280\)
4. the standard deviation of the above
= (320-240)/12^1/2
= 23.09
5. with a new bid of 300 dollars, probability you will win auction
= [(300-280)/(320-240)]/[(320-280)/(320-240)
= (20/80) / (40 /80)
= 0.25/0.5
= 0.5
Consider the polynomial function g(x) = 8x5 + ax4 + 5x + 20, where a is an unknown real number. If (x+4) is a factor of g(x), what is the value of a?
\(g(x) =8x^5 + ax^4 +5x +20 \\\\\text{If}~ x +4 ~ \text{is a factor of g(x) then,}~ \\\\g(-4)=0\\\\\implies 8(-4)^5 +a(-4)^4+5(-4) +20 = 0\\\\\implies 256a -8192 = 0\\\\\implies a = \dfrac{8192}{256} = 32\)
PLEASE HELP.................................................
Answer:
C. 4x² + 3x/2 - 7Step-by-step explanation:
Given:
f(x) = x/2 - 3g(x) = 4x² + x - 4Find (f + g)(x):
(f + g)(x) = f(x) + g(x) = x/2 - 3 + 4x² + x - 4 = 4x² + 3x/2 - 7Correct choice is C
\(\\ \tt\longmapsto (f+g)(x)=f(x)+g(x)\)
Put values\(\\ \tt\longmapsto \dfrac{x-6}{2}+4x^2+x-4\)
\(\\ \tt\longmapsto \dfrac{x-6+8x^2+2x-8}{2}\)
\(\\ \tt\longmapsto \dfrac{8x^2+3x-14}{2}\)
\(\\ \tt\longmapsto 4x^2+\dfrac{3}{2}x-7\)
Determine the domain of the function. f as a function of x is equal to the square root of two minus x.
x ≤ 2
All real numbers
x > 2
All real numbers except 2
Answer:
A. x <= 2
Step-by-step explanation:
The domain of a real function should be all real numbers. In
f(x) = sqrt(2-x)
we need 2-x to be non-negative, therefore
2-x >= 0
which implies
x <= 2
Answer:
\(\Huge \boxed{{x\leq 2}}\)
Step-by-step explanation:
The function is given,
\(f(x)=\sqrt{2-x}\)
The domain of a function are all possible values of x.
There are restrictions for the value of x.
2 - x cannot be equal to a negative number, because the square root of a negative number is undefined. 2 - x has to equal to 0 or be greater than 0.
\(2-x\geq 0\)
\(-x\geq -2\)
\(x\leq 2\)
The domain of the function is x ≤ 2.
TAKE MY POINTS pleaseeee
Answer:
156 M
Reasoning you add How far He has walked from his starting point
Step-by-step explanation:
Answer: 156 m here u go
Question content area top
Part 1
The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.11°F and a standard deviation of 0.59°F. Using the empirical rule, find each approximate percentage below.
a.
What is the approximate percentage of healthy adults with body temperatures within 1 standard deviation of the mean, or between 97.52°F and 98.70°F?
b.
What is the approximate percentage of healthy adults with body temperatures between 96.34°F and 99.88°F?
Answer:
a. Using the empirical rule, approximately 68% of healthy adults have body temperatures within 1 standard deviation of the mean, or between 97.52°F and 98.70°F.
b. Using the empirical rule, approximately 99.7% of healthy adults have body temperatures between 96.34°F and 99.88°F, which is within 3 standard deviations of the mean.
21. A plumber charges a flat fee plus a cost per hour. Customer 1 is charged $114
for a job that takes 3 hours. Customer 2 is charged $170 for a job that takes 51
hours. What is the cost for a job that takes 8 hours?
A. $198
B. $254
c. $284
D. $840
Answer:
B. $254
Step-by-step explanation:
Flat Fee: $30
Cost per hour: $28
Customer 1: 3(28) + 30 = 114
Customer 2: 5(28) + 30 = 170
Customer 3: 8(28) + 30 = 254
which of the following is the graph of the inequality
Answer:
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Step-by-step explanation:
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