Question

Four friends go to an amusement arcade.

The cost to get in is $5 per person and
the cost of each game is $2. The cost
per person can be represented by the
function c(x) = 2x + 5. Write a rule for the
total cost for the four friends if they all
play the same number of games.

Answer 1

The rule is:

T(x) = 8x + 20

Step-by-step explanation:

We are given that:

The rule for the amount that one friend pays is:

C(x) = 2x + 5

Now, we know that:

Each of the four friends will pay the entry fee which is $5 per person

The 4 friends will play the same number of games represented by x

This means that:

We can simply get the rule for the total amount to be paid by the four friends (T(x)) by multiplying the amount paid by each friend by 4

This means that:

T(x) = 4 * C(x)

T(x) = 4(2x + 5)

T(x) = 8x + 20

Hope this helps :)