Answer:
b= -2
Step-by-step explanation:
Answer:
b = -2
Step-by-step explanation:
The first thing we need to do to solve this equation is expand the brackets. To so this we need to multiply the outside term with each of the terms inside the bracket (distributive law).
This gives us:
3xb + 3x3 -4x-2 -4xb = 19
Which multiplies out to:
3b + 9 + 8 -4b = 19
Combine like terms:
-b +17 = 19
From here we move the 17 to the other side by subtracting 17 from both sides
-b +17 -17 = 19 - 17
-b = 2
Divide both sides by -1:
-b/-1 = 2/-1
Which gives us:
b = -2
Hope this helped!
An atom of rhodium (Rh) has a diameter of about 2.7×10−8cm. If the atom is assumed to be a sphere, what is the volume in m3 of a single Rh atom?
Therefore, the volume of a single Rh atom is approximately 1.011 × 10^(-29) m^3.
The diameter of a single Rh atom is given as 2.7 × 10^(-8) cm. The radius of the atom, which is half of the diameter, is therefore:
r = 2.7 × 10^(-8) cm / 2 = 1.35 × 10^(-8) cm
To find the volume of the sphere, we can use the formula:
V = (4/3)πr^3
where π is the constant pi.
Substituting the values, we get:
V = (4/3)π(1.35 × 10^(-8) cm)^3
= 1.011 × 10^(-23) cm^3
However, the answer is required in m^3, so we need to convert cm^3 to m^3. We know that:
1 cm = 0.01 m
Therefore:
(1 cm)^3 = (0.01 m)^3
1 cm^3 = 1 × 10^(-6) m^3
Substituting this conversion factor, we get:
V = 1.011 × 10^(-23) cm^3 × 1 × 10^(-6) m^3/cm^3
= 1.011 × 10^(-29) m^3
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Given the congruence statement, list all
congruent sides and angles:
Answer:
∠P ≅ ∠H ∠PO ≅ ∠HA
∠O ≅ ∠A ∠OM ≅ ∠AT
∠M ≅ ∠T ∠PM ≅ ∠HT
angle P is congruent to angle H.
angle O is congruent to angle A.
angle M is congruent to angle T.
angle PO is congruent to angle HA.
angle OM is congruent to angle AT.
angle PM is congruent to angle HT.
Rewrite the following equation in slope-intercept form. 6x - 3y = 19
Answer:
y= 2x - 19/3
Step-by-step explanation:
6x-3y=19
3y=6x-19
y=2x- 19/3
slope: 2
y-intercept: -19/3
X+y+z=6
x+y=z
1+z=x
Explain in detail step by step
What are the zeros of f(x) = x2 + x - 12?
O A. x= -4 and x = 3
O B. x=-2 and x = 6
O C. =-3 and x = 4
O D. X=-6 and x = 2
Answer:
(x+4)(x-3) or A
Step-by-step explanation:
I'm going to assume that you meant to write x² and not x2
which means we have
x²+x-12
and we need to factor this
to do this we need two numbers that add up to 1 (b) but mulitply to -12 (a*c)
our two numbers are
4, -3
Which means the answer is
(x+4)(x-3)
\({ \large{ \bf{f(x) = x {}^{2} + x - 12}}}\)
\({ \large{ \bf{zeros = \dfrac{ - b± \sqrt{b {}^{2} - 4ac } }{2a} }}}\)
\({ \large{ \bf{zeros = \dfrac{ - 1± \sqrt{1 {}^{} + 48 } }{2} }}}\)
\({ \large{ \bf{zeros = \dfrac{ -1± 7 }{2} }}}\)
\({ \large{ \bf{➢ \: \: zeros = - 4 \: \: and \: 3 }}} \: \: \: \: \: \: (ans)\)
Opt A.) is the answerWhich of the following graph shows one,non or infinite solution
Answer:
No graphs????????????
Step-by-step explanation:
a certain phone company charges $4.50 for the first five minutes of an international phone call. additional time is charged at $.50 per minute. how much would a customer be charged for an international phone call that started at 9:35 p.m. and ended at 11:15 p.m. the same day?
A customer would be charged $ 52 for an international phone call that started at 9:35 p.m. and ended at 11:15 p.m. the same day.
Charge for first 5 charged = $ 4.50
Charge for additional time = $ 0.50 per minute
Starting time = 9:35 p.m.
End time = 11:15 p.m.
Total minutes = 100 minutes
Total charge = 4.50 + (95 x 0.50)
= 4.50 + 47.50
= 52.00
Hence, a customer would be charged $ 52 for an international phone call that started at 9:35 p.m. and ended at 11:15 p.m. the same day i.e. for 100 minutes.
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PLEASE HELP As a part-time job, ethan makes deliveries for a caterer. In addition to his weekly salary, he is also paid 16$ Per delivery. Last week, he made 5 deliveries and his total salary was $215. Write a linear equation to find Ethan's total weekly salary S if he makes d deliveries.
you know he made 5 deliveries for $16 each. 5*16=80. So to find his salary you have 215-80=$135.
So he makes $135 no matter what plus $16 times the number of deliveries.
so, S=16d+135
2. What is the slope of a line perpendicular to the line y=-4x + 16?
1/4
-4
4
-1/4
The slope of a line perpendicular to y=-4x + 16 is (1/4), so the correct option is the first one (counting from the top).
How to get the slope of the perpendicular line?
The general linear equation in the slope-intercept form is:
y = a*x + b
Where a is the slope and b is the y-intercept.
Let's say that we have another line:
y = c*x + d
These two lines are perpendicular if and only if the slope of one of the lines is equal to the inverse of the opposite of the other line.
So, the two lines:
y = a*x + b
y = c*x + d
Are perpendicular only if c = -(1/a).
Now, we want to find a line perpendicular to:
y=-4x + 16
Then the slope of that perpendicular line must be:
-(1/-4) = (1/4)
So the slope of a line perpendicular to y=-4x + 16 is (1/4).
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PLEASE ANSWER IT DUE TODAY !!!!
Answer:
1:b, 2:c, 3:a, 4:d
Step-by-step explanation:
Aline passes through (2, -1) with slope 3.
What is the equation of the line in slope-intercept form?
Pete grabbed 18 mixed nuts, 2/9 of which were almonds. Which equation shows how to determine the number of almonds Pete grabbed? A.18 divided by 2/9 =81
Answer:
18 multiplied by 2/9 = 4
Step-by-step explanation:
To determine the number of almonds that Pete grabbed, you have to multiply how much of the nuts were almonds by the total number of nuts that he grabbed. So,
2/9 × 18
= 0.2222 × 18
= 4
Pete grabbed 4 almonds out of the 18 mixed nuts that he grabbed.
Hope that helps.
Answer:
Amount of almonds = 18 × [2/9]
Amount of almonds = 4 almonds
Step-by-step explanation:
Given:
Number of mixed nuts = 18
Probability of almonds = 2/9
Find:
Amount of almonds
Computation:
Amount of almonds = Number of mixed nuts × Probability of almonds
Amount of almonds = 18 × [2/9]
Amount of almonds = 36 / 4
Amount of almonds = 4 almonds
The _______________ is the smallest value within the class and the _______________ is the largest value within the class.
The smallest value within the class is the lower class limit, and the largest value within the class is the upper class limit.
A class limit is a set of boundary values in the form of a range that describes the lowest and highest data values that a class can contain. The lower class limit refers to the smallest data value in a class, whereas the upper class limit refers to the largest data value in a class. The width of a class is determined by the difference between the upper and lower class limits. Here are a few examples to give you a better understanding of how this works:
Class: 5-9 5 9
Lower Limit: 10-14 10 14
Upper Limit: 15-19 15 19
This shows class limits for three different classes.
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1.) through: (3,0), parallel to y=2/3x+1
2.) through: (4,1), parallel to y=-1/2x+2
3.) through: (-1,-1), parallel to y=-2x-4
4.) through: (-4,-5), parallel to y=-2x-5
5.) through: (-4,3), parallel to y=1/2x-3
6.) through: (5,-5), parallel to y=-3/2x+2
Step-by-step explanation:
Hey there!
1.no Ans:
The equation of a st.line passing through point (3,0) is;
(y-0) = m1(x-3)........(i)
Another equation is,
y = 2/3x+1...........(ii)
Comparing the equation (ii) with y= mx+c. We get;
Slope (m2)= 2/3
As they are parallel lines, m1=m2.
So, putting value of m1 in equation (i).
\(y = \frac{2}{3} (x - 3)\)
\(y = \frac{2}{3} x - 3 \times \frac{2}{3} \)
Therefore the required equation is; y = 2/3x -2.
2.Ans:
The equation of a st.line passing through (4,1) is;
(y-1) = m1(x-4)...........(i)
y = -1/2x +2...............(ii)
From equation (ii)
y = -1/2x+2
Comparing the equation with y = mx+c
Slope (m2)= -1/2
As they are equal m1=m2= -1/2
Putting value of slope in equation (i)
\((y - 1) = \frac{ - 1}{2} (x + 2)\)
\(2(y - 1) = - 1(x + 2)\)
\(2y - 2 = - x - 2\)
\(x + 2y = 0\)
Therefore the required equation is; x+2y=0.
3. no. Ans:
The equation of a st.line passing through point (-1,-1) is ;
(y+1)= m1(x+1)..........(i)
y= -2x-4.....................(ii)
From equation (ii)
Comparing the equation with y = mx+c.
Slope(m2)= -2
As they are parallel lines, m1=m2 = -2.
Putting value of slope in equation (i)
\((y + 1) = - 2(x + 1)\)
\(y + 1 = - 2x - 2\)
\(2x + y + 3 = 0\)
Therefore the required equation is 2x+y+3=0.
4.no Ans:
The equation of a st.line passing through (-4,-5) is;
(y+5) = m1(x+4)..........(i)
y = -2x-5...............(ii)
From equation (ii)
Comparing the equation with y = mx+c, we get;
Slope (m2)= -2
As they are parallel lines, m1=m2= -2
Putting value of slope in equation (i)
\((y + 5) = - 2(x + 4)\)
\(y + 5 = - 2x - 8\)
\(2x + y + 13 = 0\)
Therefore the required equation is 2x+y+13=0.
5.no Ans:
The equation of a st.line passing through (-4,3) is:
(y-3)= m1(x+4).........(i)
y = 1/2x-3.......(ii)
From equation (ii)
Comparing the equation with y= mx+c.
Slope (m2) = 1/2
As they are parallel lines, m1=m2 = 1/2.
Putting value of slope in equation (i)
\((y - 3) = \frac{1}{2} (x + 4)\)
\(2(y - 3) = x + 4\)
\(2y - 6 = x + 4\)
\(x - 2y + 10 = 0\)
Therefore the required equation is; x-2y+10=0.
6.no. Ans;
The equation of a st.line passing through (5,-5) is;
(y+5)= m1(x-5)............(i)
y = -3/2x+2......(ii)
Comparing the equation (ii) with y = mx+c.
Slope(m2)= -3/2.
As they are parallel lines, m1=m2= -3/2.
Putting value of slope in equation (i)
\((y + 5) = \frac{ - 3}{2} (x - 5)\)
\(2(y + 5) = - 3(x - 5)\)
\(2y + 10 = - 3x + 15\)
\(3x + 2y - 5 = 0\)
Therefore the required equation is; 3x+2y-5=0.
Hope it helps...
Cost price=birr2500 and selling price = birr 2000
The profit percentage of the cupboard is 25%.
The cost price (CP) of the cupboard is Rs.2000 and the selling price (SP) is Rs.2500.
The money that remains after paying your business expenses is your profit. Gross profit, operating profit, and net profit are the three primary types of profit.
To calculate the profit or loss percentage, we can use the following formula.
Profit or loss percentage = (Profit or loss / Cost price) x 100
where profit or loss is calculated as the difference between the selling price and cost price.
In this case, the profit is:
Profit = Selling price - Cost price = Rs.2500 - Rs.2000 = Rs.500
Therefore, the profit percentage is:
Profit percentage = (Profit / Cost price) x 100
= (500 / 2000) x 100
= 25%
So, the profit percentage is 25%.
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Note the full question is
A cupboard was bought for Rs.2000 and sold for Rs. 2500. Find the profit or loss percent.
imagine i flip 100 coins in a sequence, and you need to guess the sequence. you are allowed to ask one yes/no question. what do you ask to maximize the probability of guessing the sequence?
On solving the provided question, we can say that the probability of guessing the sequence 2^99 possible combinations.
What is probability?Probability theory, a subfield of mathematics, gauges the likelihood of an occurrence or a claim being true.
As soon as you realize there are more heads than tails, you realize you require at least 50 of them, and you ask 100 people to select 50 locations for them to go.
Considering that you have 250 options for the remaining coins, there are a total of (100 pick 50) + 250 combinations that are feasible.
There are 299 potential options if you simply inquire as to whether the first coin will land on heads.
Asking whether there are more heads than tails is preferable because, according to Wolfram Alpha, 299 is larger than (100 pick 50) + 250.
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You can refer to the top right for the correct answers for the both questions respectively, i have tried to no avail.
Bob takes a job in which he receives a starting salary of $30000 per year, with raises of $600 per year. Sue takes a job in which she receives a starting salary of $15000 per half year, with raises of $300 every six months. Which person is better paid? Explain.
Using linear functions, it is found that both people are paid the same.
What is a linear function?A linear function is modeled by:
y = mx + b
In which:
m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.For Bob, we have that that the intercept is of 30000, with a slope of $600, hence his salary after x years is given by:
B(x) = 30,000 + 600x.
For Sue, we have that that the intercept is of 2 x 15000 = 30000, which is the fixed yearly salary with a slope of 2 x 300 = $600, hence her salary after x years is given by:
S(x) = 30,000 + 600x.
The salaries are equal, that is, both people are paid the same.
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PLEASE HELP MARKING BRAINLEIST JUST ANSWER ASAP AND BE CORRECT
Answer:
The perimeter is the sum of the lengths of all the sides of a polygon. Thus, the perimeter of this quadrilateral is:
(10a-6) + (7a+4) + (7a+4) + (10a-6)
Simplifying the expression:
= 34a - 4
Therefore, the perimeter of the quadrilateral is 34a - 4.
Write an absolute value equation to satisfy the given solution set shown on a number line.
Answer:
Step-by-step explanation:
|x-a|≤b
-b≤x-a≤b
add a
a-b≤x≤a+b
put a-b=-8
a+b=-4
add
2a=-12
a=-12/2=-6
-6+b=-4
b=-4+6=2
so |x+6|≤2
an engineer has designed a valve that will regulate water pressure on an automobile engine. the valve was tested on 100 engines and the mean pressure was 5.5 lbs/square inch. assume the standard deviation is known to be 0.7 . if the valve was designed to produce a mean pressure of 5.3 lbs/square inch, is there sufficient evidence at the 0.05 level that the valve performs above the specifications? state the null and alternative hypotheses for the above scenario.
There is sufficient evidence that the valve performs above the specifications.
Null Hypothesis (H0): The mean pressure of the valve is equal to 5.3 lbs/square inch
Alternative Hypothesis (H1): The mean pressure of the valve is greater than 5.3 lbs/square inch
To test whether the valve performs above the specifications, a hypothesis test can be used. The test statistic used will be a t-test since the sample size is below 30. The critical value at the 0.05 level is 1.645. The formula for the t-test is: t = (X-μ)/(s/√n) , where X is the sample mean, μ is the population mean, s is the sample standard deviation, and n is the sample size.
Plugging in the known values, the t-test is calculated as: t = (5.5-5.3)/(0.7/√100) = 2.571. Since this value is greater than the critical value at the 0.05 level (1.645), we can reject the null hypothesis and conclude that there is sufficient evidence that the valve performs above the specifications.
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A Moving to another question will save this response. estion 18 A work system has five separate stations that have process times of \( 5,9,4,9 \), and 8 . What is the thoroughput? 9 18 26 35 A Moving
the average processing time.1/7 = 0.1428The thorough put is equal to 0.1428 which is equivalent to 1 unit produced every 7 minutes. Therefore, the correct option is 18.
Thorough put is the amount of goods or services that are produced by a system, unit, or organization over a period.
To calculate thorough put, one must divide the total quantity of output by the time taken to generate the output.
Let's see the given problem below: A work system has five separate stations that have process times of \( 5,9,4,9 \), and 8 .
What is the thorough put? To begin with, we'll need to calculate the total processing time.
The processing times are: 5, 9, 4, 9, and 8. Summing these values up, we get 35.
Next, we'll divide the total processing time by the number of stations to get the average processing time.35 / 5 = 7
Finally, we will calculate the throughput as the reciprocal of the average processing time.1/7 = 0.1428The thorough put is equal to 0.1428 which is equivalent to 1 unit produced every 7 minutes. Therefore, the correct option is 18.
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a
= 13 m,
b
= 9 m and
c
= 2 m for the triangle shown below.
Work out the value of
x
, giving your answer as an exact surd.
The diagram is not drawn accurately
Answer:
2√21
Step-by-step explanation:
let the sides of bigger triangle be a, b and d.
then,
a²= b² + d² [ by Pythagoras theorem]
13² = 9² + d²
d² = 13² - 9²
d²= 169 - 81
d² = 88
d = √88
Now, the sides of smaller triangle are c, x, and d
by Pythagoras theorem,
d² = c²+x²
(√88)² = 2² + x²
88 - 4 = x²
x² = 84
x = √84
x= 2x2x3x7
x = 2√21
Therefore, the value of x is 2√21
Hope it's helpful..
Please help me with this homework
Answer:
20km
Step-by-step explanation:
we need to find c, which is the hypotenuse of the right triangle.
we know the lengths of the legs, which are given as 16km and 12km
you might notice that 16km and 12km can both be divided by 4, which will then give is 4 and 3.
3,4,5 is a pythagorean triple-(the sums of the squares of 3 and 4 is equal to the square of 5).
The triple can be proved:
3²+4²=5²
9+16=25
25=25
that means the lengths of the triangle is a multiple of the triple 3, 4, and 5
so that means that c is 5*something
since 12 and 16 are 3*4 and 4*4 respectively, that means that c must be 5*4=20km
Hope this helps!
A veterinarian knows that a 50-pound dog gets 0.5 milligram of a certain medicine, and that the number of milligrams, m, varies directly with the weight of the dog, w. The vet uses these steps to find the amount of medicine to give a 10-pound dog. Step 1 Find the constant of variation. Step 2 Write the direct variation equation. Step 3 Substitute 10 into the equation to find the dosage for a 10-pound dog. Step 4 Solve for w. The 10-pound dog needs 1000 milligrams. In which step did the veterinarian make the first error? Step 1 Step 2 Step 3 Step 4
1. Divide the amount needed by the weight:
0.5 milligram / 50 pounds = 0.01 milligram per pound.
2. m = 0.01w
3. m = 0.01(10)
4 m = 0.01 x 10
0.1 milligrams
The error was step 1.
Answer:
Step 3
Step-by-step explanation:
They put the 10 in the wrong place.
A concert hall has seven sections. Each section has 23 rules. Please roll has 14 seats. If the theater sells out pretty particular performance, how many people attended? If the average ticket sold for $20, how much was collected at the box office? Need to write an equation. Thanks
Answer:
The number of people that attended the performance = 2,254
Amount collected at box office = $45,080
Step-by-step explanation:
For the theater to sell out a performance, it means it was filled to the brim( completely filled)
We have 7 sections, with 23 rows each
The total number of rows will be 23 * 7 = 161 rows
Since each row has 14 seats, the total number of seats will be 161 * 14 = 2,254 seats
Secondly we want to know how much was collected at the box office given the average ticket price
The amount collected at the box office = Number of seats * average ticket price = 2,254 * 20 = $45,080
A 3-inch candle burns down in 3 hours. At what rate does the candle burn, in inches per hour?
Answer 1 inch per hour
Step-by-step explanation:
Answer:
1 inch per hour
Step-by-step explanation:
Let x represent inches burned per hour
The equation to finding the rate of the candle burning:
3x=3
For those who dont know, whenever you have a variable with a term, its basically multiplying, and we want to do the opposite to get x by itself, so we divide
x=3/3
Which can be simplified as:
x=1
Where x is the inches burned per hour, which equal 1
Find the area under the curve y = 2 x^-3 from x = 6 to x = t and evaluate it for t = 10 , t = 100 . Then find the total area under this curve for x ≥ 6 .
(a) t = 10
(b) t = 100
(c) Total area
The total area under the curve for x ≥ 6 is 449/4500.
The area under the curve y = 2x-3 from x = 6 to x = t and its evaluation at t = 10 and t = 100The area under the curve y = 2x-3 from x = 6 to x = t can be calculated as follows:
We know that the area of the region under the curve f(x) between x = a and x = b is given by \(A = ∫abf(x)dx\)
Since the given function is y = 2x-3, we can write it as y = 2x^(-3) by applying the power rule.
Hence,A = \(∫62x^(-3)dx = [-2x^(-2)]6t = -2/t^2 + 2/36\)We need to evaluate this area for t = 10 and t = 100, so we get\(A = -2/10^2 + 2/36 = -1/25 + 1/18 = 7/450andA = -2/100^2 + 2/36 = -1/5000 + 1/18 = 449/4500\)Total area under this curve for x ≥ 6
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Could someone please answer this question!!?
Which shapes have at least 1 right angle? Choose all that are correct.
Answer:
the square, the weird orange shape, and the rectangle
Step-by-step explanation:
squares and rectangles have to have 4 right angle to make it that shape.
the weird orange shape has one right angle.
The Pink square, Green Rectangle, and the Orange figure have at least 1 right angle.
What is Area of Rectangle?
The area of Rectangle is length times of width.
A rectangle with four sides of equal length is a square.
A right angle is an angle that is exactly equal to 90 degrees in measure.
According to question, we have to find which shapes have at least 1 right angle.
In the given figure, we can see that the pink square, green Rectangle, and the orange figure have at least 1 right angle or have degree in them.
Hence, we can conclude that the Pink square, Green Rectangle, and the Orange figure have at least 1 right angle.
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