Answer:
$4.50
Step-by-step explanation:
8 apples = $4
9 apples = ?
8 ÷ 4 = 0.50
0.50 × 9 = 4.50
= $4.50
6
14/2.8
y = 2.50x + 10
sin 30 = x/4
sin 30 = 0.5
0.5 = x/4
x = 2