Combining Functions math question

Question

the revenue function of a school group selling n bookmarks is given by P(n)= 2n and the total cost function is given by C(n)= 144+0.80n

a) determine the simplified equation for P(n), the profit function for the situation

b) determine the profit if 1000 bookmarks are sold

c)determine the number of bookmarks that need to be sold for the school group to break even

Answer 1

Profit = Revenue - Cost, so

P(n) = R(n) - C(n)

P(n) = (2n) - (144+.80n)

You will need to distribute the minus sign to both terms in the second set of parentheses and then combine like terms.

Once you have the simplified profit function, plug in 1000 for n.