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Evaluating and Interpreting Function Notation

Evaluating and Interpreting Function Notation 1.15 - Solution

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a
The exercise gives us a function that describes the cost in dollars of buying tickets to an ice hockey game, using a discount coupon. In the formula, represents cost, in dollars, and represents number of tickets. Gordie buys four tickets, one for himself and one each for three friends. Calculating the cost of buying four tickets is the same as evaluating for To do so, we substitute for in the function.
Simplify
With a coupon, it costs to buy tickets to the orchestra.
b
In Part A, we were given the number of tickets and needed to calculate the cost. This time we are given the cost and want to calculate the number of tickets. Calculating the number of tickets that can be bought with means that we will need to substitute this amount for in the function, and solve for
Solve for
With Danijela can buy tickets.