Question

The area of the following rectangle is 30 square units. What is the value of x

a.6.4 units
b.8 units
c.27 units
d.12 units

Answer 1

The answer is B.

8-2=6
6*5=30

Answer 2

The area of a rectangle is given by the multiplication of both sides of the rectangle. (x-2)×5
It is given that the area will be 30 square units. This means that the above-shown multiplication will be equal to 30 square units. (x-2)×5=30
The value of x is found by putting x in evidence:
x-2=
`(30)/(5)` ⇔ x=
`(30)/(5)`+2 ⇔ x=6+2 ⇔ x=8
The value of x is 8.