Ross bought classic comic books for 10 each. when the price increased to $17 per book, he sold all of his comic books except one. his profit was $49. how many comic books did ross buy? explain how you found the answer.

x = number of comics Ross bought

A = 10*x = amount spent on buying those x number of comics at $10 each

B = 17*(x-1) = amount Ross gets from selling every comic book except one

B-A = 17*(x-1)-10x = 7x-17 = profit = 49

7x-17 = 49

7x = 49+17

7x = 66

x = 66/7

x = 9.42857 approximately

Because x isn't a whole number, I'm thinking that there's a typo in the problem somewhere. I would double check with your teacher.

the graph on the bottom right

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