Ask question

Ask question

All categories

3 years ago

5

The width of a rectangle is the length minus 4 units. The area of the rectangle is 21 units. What is the width, in units, of the

rectangle?

1 answer:

beks73 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

$W=L-4\\ \\ L=W+4\\ \\ A=LW\\ \\ A=(W+4)W\\ \\ A=W^2+4W\\ \\ A=21\\ \\ W^2+4W=21\\ \\ W^2+4W-21=0\\ \\ (W+7)(W-3)=0\\ \\ W>0\\ \\ W=3u$

You might be interested in

Solve the equation 2 3/5 × 1 3/7

Airida [17]

Answer:

26/7

Step-by-step explanation:

$2\frac{3}{5} * 1\frac{3}{7}$ =

$\frac{13}{5}* \frac{10}{3} =$

$\frac{130}{35}$ =

simplify= 26/7

8 0

3 years ago

Molli purchased 8 apples for $2.96 while looking at her reciept molli divided $2.96 by 8. Why might molli perform this calculati

Basile [38]

B

Let’s put this into a simple equation

8 apples = 2.96

We can substitute apples for x

8x=2.96

She divided by 8

X= 2.96/8

Remember x represents apples so only 1 x represents 1 apple

So that means the answer is B.

Hope that helped!

4 0

2 years ago

Read 2 more answers

Marty Has Four Cubes. The Cubes Me-sure 13x3x10. what is the volume of all his cubes divided on 2?

tatuchka [14]

Answer:

845

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Can someone please explain y=mx+b

lana [24]

$y=mx+b$ is slope-intercept form, which is a way of writing an equation for a line.

In this equation, $m$ represents the slope and $b$ represents the y-intercept.

$x$ and $y$ are the coordinates of a point on the resulting line.

Here are some examples:

$y=3x+2$

$y=-2x-4$

$y=8x-1$

$y=-7x+5$

7 0

2 years ago

Help please!!!!! I’m using Plato

pshichka [43]

Answer:

$\frac{y^{6} }{ x^{2} }$

Step-by-step explanation:

$y^{6} x^{-2}$

6 0

2 years ago

Read 2 more answers