Answer:
$8
Step-by-step explanation:
A group of tourists spends $156 to rent snorkels and fins.
They rented 15 snorkels and 18 pairs of fins.
Renting a snorkel costs four times as much as renting a pair of fins.
Let us assume that the rental cost of a pair of fins is x, so the rental cost of snorkel will be 4x.
Then total cost of 15 snorkels and 18 pairs of fins will be,
[tex]=15(4x)+18x[/tex]
[tex]=60x+18x[/tex]
[tex]=78x[/tex]
But it is given as $156, so
[tex]\Rightarrow 78x=156[/tex]
[tex]\Rightarrow x=2[/tex]
Therefore, the rental cost of a pair of fins is $2 and cost of snorkel is [tex]2\times 4=\$8[/tex]
