The sum of two numbers is 91. the greater number is 7 more than the smaller number. which equation can be used to solve for the smaller number?

a. x(x + 7) = 91
b. x(x − 7) = 91
c. x + (x + 7) = 91
d. x − (x + 7) = 91

sum is addition

7 more than the number would be x+7

so x + (x+7) = 91 is the right formula

Answer is C

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

c

step-by-step explanation: