80-30 = 50
She spent $50
She was there for 5 hours
$50/5 = 10
The rate of change is $10 per hour.
Answer:
4y-x+6
Step-by-step explanation:
16, 8, 23
2x+x+x+15=47
4x+15=47
4x=32
x=8
2x=16
x+15=23
Answer:500(1.2)^x
Plato :)