Answer:
highlight input and output.
Step-by-step explanation:
sorry if this doesn't work. i'm not 100% sure but its worth a try.
Answer:
Production cost is $20 per item.
Step-by-step explanation:
Fixed cost is $100 and 20 items cost $500 to produce.
Production cost = $20.
So, 
, where C is total cost and x is the number of items produced.
Answer:
Step-by-step explanation:
x^2-10x+21
(x-7)(x-3)
find the 2 numbers that when multiplied make the last number or +21 and when combined make the middle number of -10. -7*-3 = 21 and -7+-3=10
Answer:
600
Step-by-step explanation:
