Bud $100 - $50 Donation = $50
17 Students at a $3 Profit per student gives you $51 covering the cost of the Bus and also covering the $7 cost per student.
It might be 7 2/4 cups of sugar hope I help you.
Answer:

Step-by-step explanation:
Given
--- initial
-- rate
Value after a year = $20.70
Required
Expression to calculate its value after y years
This is calculated using:

Where

Substitute
in 



Substitute
and
in 

Answer:
You just need to put the given value of x-input in function f(x)=2x²+6x-8 to get y-output