Apiece of cheese is in the shape of an isosceles right triangular prism. the triangular base is 4 cm and the height is 2 cm. the rectangular base is 5 cm with a height of 3 cm. how much plastic wrap is needed to completely cover the cheese?

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72