Answer: 280
<u>Step-by-step explanation:</u>
Quantity X Cost = Money Received
Adult: x 3 3x
Children: 500-x 2 2(500 - x) = 1000 - 2x
Adult = Children + 400
3x = 1000 - 2x + 400
3x = 1400 - 2x
5x = 1400
x = 280
F (x) = 4x ⇒ y = 4x
↓
x = 4y Divide by 4 on both sides
↓
x / 4 = y ⇒ Inverse function = x / 4
75
60+7.20= 67.20
67.20+7.80= 75
Answer:x=-8
Step-by-step explanation:subtract 21 from both sides then simplify 31-21 to -8
He gains 6 Pounds a month, overall he gains 72 pounds in 12 months
