Need to know the area of the composite figure.

Assuming you mean the dark area, we can derive it by subtracting the area of the inner triangle from the area of the outer rectangle.

They are both pretty straightforward to compute: the outer area is given by the product of the dimensions:

The area of the triangle is half the product of base and height:

So, the dark area is given by

equal to

step-by-step explanation:

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72