Explanation:
we need to find the cost of one apple
18 apples = $5.80
1 apple = x
let's cross multiply:
18apples (x) = 1 apple ($5.80)
x = $5.80/18
x = 0.32
one apple = $0.32
Cost for 120 apples:
[tex]\begin{gathered} =\text{ cost of 1 apple}\times\text{ 120} \\ =\text{ \$0.32}\times120 \\ \cos t\text{ of 1 apple = \$38.4} \end{gathered}[/tex]