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3 years ago

Find an equation in slope-intercept form of the line that has slope 9 and passes through point A(-9, -1).

Mathematics

1 answer:

Step2247 [10]3 years ago

3 0

Answer:

y = 9x+80

Step-by-step explanation:

We can use the slope intercept form of a line

y = mx+b where m is the slope and b is the y intercept

y = 9x+b

Substitute the point in for x and y

-1 = 9(-9) +b

-1 = -81 +b

Add 81 to each side

-1+81 = b

80 =b

The equation is y = 9x+80

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allochka39001 [22]

Answer:

864

Step-by-step explanation:

because if you take 8 percent of 900 72 x 12 you get 864.

4 0

3 years ago

If the radius is 7 units and the hight is 8 units what is the volume of the cylinder?

Alla [95]

Volume of cylinder is 1231.5 cm^2

Step-by-step explanation:

we are given:

Radius of cylinder = 7 units

Height of cylinder = 8 units

We need to find volume of cylinder

The formula used to find volume of cylinder is:

$Volume\,\,of\,\,cylinder=\pi r^2h$

Putting values and finding volume of cylinder:

$Volume\,\,of\,\,cylinder=\pi r^2h$

$Volume\,\,of\,\,cylinder=3.14*(7)^2*8$

$Volume\,\,of\,\,cylinder=1231.5\,\,units^2$

So, Volume of cylinder is 1231.5 cm^2

Keywords: Volume of cylinder

Learn more about volume of cylinder at:

#learnwithBrainly

8 0

3 years ago

The sum of the measure of the interior angles of a polygon is 1080°.

andrew-mc [135]

The answer is Octagon

6 0

4 years ago

Read 2 more answers

The ratio of Maths and science books in a school library is 4:5. If the number of science books is 75, find the number of Maths

sveticcg [70]

Answer:

let ratio 4:5 be 4x& 5x

according to the question

5x=75

x=75/5=15

the number of Maths books=4x=4×5=20 is your answer

8 0

3 years ago

Lucky Charms are sold in boxes with an advertised mean weight of 20.5 oz. The standard deviation is known to be 2.25 oz. A consu

Alinara [238K]

Answer:

Set of hypothesis.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 20.5 oz

Sample mean, $\bar{x}$ = 20.4 oz

Sample size, n = 50

Population standard deviation, σ = 2.25 oz

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20.5\text{ oz}\\H_A: \mu < 20.5\text{ oz}$

We use One-tailed z test(left tailed) to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{20.4 - 20.5}{\frac{2.25}{\sqrt{50}} } = -0.3142$

Based on the significance level, we can make our decision and complete the hypothesis testing.

We may accept the null hypothesis or fail to accept depending on different significance level.

4 0

4 years ago