A local gym charge nonmembers $ 19 per hour to use the tennis courts. Members pay a yearly fee of $300 and $4 per hour for using the tennis courts. Write and solve an equation to find how many hours you must use the tennis courts to justify becoming a member.

Member pays 300 + 4 x

guest pays 19 x
when are they the same?

19 x = 4 x + 300
15 x = 300

You can take it from there I think.

To find how many hours you must use the tennis courts to justify becoming a member, we need to compare the costs for nonmembers and members.

For nonmembers, the cost is $19 per hour.

For members, the cost consists of the yearly fee of $300 plus $4 per hour.

Let's assume x represents the number of hours you need to use the tennis courts.

For nonmembers: Cost = $19 * x

For members: Cost = $300 + $4 * x

To find the equation, we need to set the costs equal to each other:

$19 * x = $300 + $4 * x

Now we can solve for x.

Subtract $4 * x from both sides:

$19 * x - $4 * x = $300

Combine like terms:

$15 * x = $300

Divide both sides by $15:

x = $300 / $15

Simplifying further:

x = 20

Therefore, you would need to use the tennis courts for a minimum of 20 hours to justify becoming a member.