Just look at the question on the picture

A =  ½bh + lw  

Step-by-step explanation:

Your composite figure is a triangle on top of a rectangle.

The formula for the area of a triangle is    A = ½bh.

The formula for the area of a rectangle is A =    lw.

The formula for the total area is

A =  ½bh + lw.

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

a is the right answer