If x = 9 units, y = 3 units, and h = 8 units, find the area of the rhombus shown above using decomposition.

Step-by-step explanation:

Given

     

See attachment for rhombus

Required

Determine the area

From the attached rhombus:

We have

(1) Triangle

The area is:

(2) Triangle

The area is:

(3) Rectangle

because all sides are equal, so the remaining side is x - y

So:

So, the area is:

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.