D. About 122 units I just took the test
The answer is 15. Each one is 5 pieces and there are 3 of them. so 5 x 3 = 15
Answer:
-2x + 7/5
Step-by-step explanation:
(7-10x)/5
=
+ 
= -2x + 7/5
Step-by-step explanation:
49 = -16t^2 + 56t
-16t^2 + 56t -49 = 0
(-4t +7) (4t -7) = 0
-4t+7 =0
t = 7/4