Step-by-step explanation:
Apples cost four times as much as oranges per pound.
If the cost of orange =x
then, cost of apples =4x
But,
the costs of apples =2.80$
So,4x=2.80
[tex]\tt{ x=\dfrac{2.80}{4} }[/tex] ⠀
[tex]\tt{ x=0.70\$ }[/tex] ⠀
so,oranges costs for per pound =0.70$