Question

The function f(x) represents the total cost for x tickets for a carnival, including the entry fee.

f(x)=0.50x+4

What is the value of f(20), and what does it mean in the context of the situation?
A.
f(20)=32; this means that it costs $20 to purchase 32 tickets and pay the entry fee.
B.
f(20)=14; this means that it costs $14 to purchase 20 tickets and pay the entry fee.
C.
f(20)=14; this means that it costs $20 to purchase 14 tickets and pay the entry fee.
D.
f(20)=32; this means that it costs $32 to purchase 20 tickets and pay the entry fee.

Answer 1

Answer:

  B.  f(20)=14; this means that it costs $14 to purchase 20 tickets and pay the entry fee.

Step-by-step explanation:

To evaluate the function, put 20 where x is, then do the arithmetic.

  f(20) = 0.50·20 +4 = 10 +4

  f(20) = 14

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To find the interpretation, put 20 where x is in the description of the function:

  "The function f(20) represents the total cost for 20 tickets for a carnival, including the entry fee."

The appropriate choice is the one that matches these: choice B.