I think it is 500 or 300 I really just guessed sorry
Answer:
B (2.5, 0)
Step-by-step explanation:
2x - y = 5 (multiply all by 4)
8x- 4y = 20
-8x - 4y = - 20
eliminate the 4y
8x- 4y = 20
-8x - 4y = - 20
-------------------- –
16x = 40
x = 40/16 = 2.5
now we substitute x with 2.5
2x - y = 5
2(2.5) - y = 5
y = 0
so since Mrs Jackson used 2/15 of 7/8, the amount she used is simply their product.

The answer is 10.4 because 5 is counted as higher so it's 10.4.