Dave has $15 to spend on an $8 book and two birthday cards (c) for his friends. How much can
he spend on each card if he buys the same card
for each friend?

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3.50 on each cuz 15-8=7 and 7÷2= 3.5 or 3.50

d

step-by-step explanation:

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