Question

Which algebraic expression will solve for the blue area of this square figure?

A. -12x
B. -2x+30
C. 10x+18
D. 20x

Answer 1

Option B.
`-2x+30`

Explanation:

we know that

The blue area is equal to the area of complete rectangle minus the area of the white rectangle

so

`A=(5+3x)(6)-(5)(4x)\\\\ A=(30+18x)-(20x)\\ \\A=-2x+30`