The length of a rectangle is 4 more than its width. The area of the rectangle is 21m2. What is the measure of the width?

Question 10 options:

-7m

4m

3m

7m

Its 3m i just took it and put the answer 4m in and it said it was wrong

Length (l) = 4 + w

Width (w) = w

Area (A) = 21m^2

so keep in mind Area = Length * width

A = l*w

21 = (4+w) (w)

21 = 4w + 2w

21=6w

w=3.5

The width is 3.5m

so the answer is about 4m