Ask question

Ask question

All categories

3 years ago

10

Which expression is equivalent to

1 answer:

maksim [4K]3 years ago

5 0

The answer is C . -7r^2 + 12r -8

You might be interested in

A line passes through point A (14,21). A second point on the line has an x-value that is 125% of the x-value of point A and a y-

seropon [69]

Answer:

The equation of the line in point-slope form is $y-21 = - \frac{3}{2}\cdot (x-14)$ .

Step-by-step explanation:

According to the statement, let $A(x,y) = (14,21)$ and $B(x,y) = (1.25\cdot x_{A},0.75\cdot y_{A})$ . The equation of the line in point-slope form is defined by the following formula:

$y-y_{A} = m\cdot (x-x_{A})$ (1)

Where:

$x_{A}$ , $y_{A}$ - Coordinates of the point A, dimensionless.

$m$ - Slope, dimensionless.

$x$ - Independent variable, dimensionless.

$y$ - Dependent variable, dimensionless.

In addition, the slope of the line is defined by:

$m = \frac{y_{B}-y_{A}}{x_{B}-x_{A}}$ (2)

If we know that $x_{A} = 14$ and $y_{A} = 21$ , then the equation of the line in point-slope form is:

$x_{B} = 1.25\cdot (14)$

$x_{B} = 17.5$

$y_{B} = 0.75\cdot (21)$

$y_{B} = 15.75$

From (2):

$m = \frac{15.75-21}{17.5-14}$

$m = -\frac{3}{2}$

By (1):

$y-21 = - \frac{3}{2}\cdot (x-14)$

The equation of the line in point-slope form is $y-21 = - \frac{3}{2}\cdot (x-14)$ .

5 0

3 years ago

IF 30 Men Car do a piece of Work in 30 days the

kiruha [24]

Answer:

let, the days for 10 men be x

30/10=x/30
900=10x
x=900/10
x=90

so 10 men can complete the same work in 90days.

Hope it helps.

4 0

3 years ago

Read 2 more answers

What is the product of 3x(x + 4)<br> cOf

Lyrx [107]

Answer:

3x²+12x

Step-by-step explanation:

Expand the brackets

6 0

3 years ago

Cameron bakes two pans of brownies for the school bake sale. She couldn't wait and ate 1/6 of a pan. How many pans of brownies d

torisob [31]

Answer:

$1\frac{5}{6}$

Step-by-step explanation:

She has one whole pan and 5/6 of a pan left.

8 0

3 years ago

a rectangular fish tank 60 centimeters by 15 centimeters by 34 centimeters is 1/3 full of water. find the volume of water needed

son4ous [18]

Answer:

$20,400\ cm^{3}$

Step-by-step explanation:

step 1

Find the volume of the tank

$V=(60)(15)(34)=30,600\ cm^{3}$

step 2

we know that

If the tank is 1/3 full of water

then

the volume of water required to completely fill the tank is equal to 2/3 of the tank capacity

so

$(2/3)30,600=20,400\ cm^{3}$

5 0

3 years ago