Amber is 11 years younger than Adrianna. The sum of their ages is 17. How old are Amber and Adrianna?
Amber is
years old and Adrianna is
years old.

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

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation: