Question

Which of the following statements explains how to solve for l using the formula A = lw, when A = 28 1/4 and w = 2 1/2?

1. Subtract 2 1/2 from 28 1/4.
2. Divide 2 1/2 by 28 1/4.
3. Multiply 28 1/4 by 2 1/2.
4. Divide 28 1/4 by 2 1/2.

Answer 1

Divide 28 by 2

Step-by-step explanation:

When the variable of interest is multiplied by something, you undo that multiplication by dividing the equation by that something.

Here, l is multiplied by 2, so the solution is found by dividing ...

... 28 = l·2

by 2 to get ...

... 28/2 = l

That is, you divide 28 by 2 to find l.

Answer 2

4

Explanation:

you have to reverse the equation is A=lw then to get l you use l=A/w