Question

Write an expression for the area of this rectangle. Expand your expression so that your

answer does not contain brackets.
7-d
3
Not to scale

Answer 1

The area of the rectangle from the expression is (21 - 3d) units

Area of a rectangle

The formula for calculating the area of a rectangle is expressed as:

Area = Length * Width

Given that length = 7 - d and the width is 3 units, on substituting, we will have:

Area = 3 (7 - d)

Expand to have:

Area = 3(7) - 3d

Area = 21 - 3d

Hence the area of the rectangle from the expression is (21 - 3d) units