I would say your friends assumption is wrong. Why?
Because, if you payed $2.40 for 3/4 pounds of grapes, your friend should pay more for an entire pound, not less.
Hope this helped! c:
Answer:
the answer is d e and fans f
Answer:

Step-by-step explanation:
{x -4y = −21
{8y - x = 45
_________

[Plug this back into both equations above to get the x-coordinate of 3]; 
I am joyous to assist you anytime.
9/16 is the original fraction. 9+3 = 12 and 16-1 =15. 12/15 = 4/5
Y= -2x + 3
y = x - 5
y = y
-2x + 3 = x - 5
5 + 3 = 2x + x
8 = 3x
8/3 = x
2.67 = x