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.

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.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have