Answer:
& 
Step-by-step explanation:
1) Subtract
from both sides. This should leave you with
.
2) Square root both sides. This should leave you with
&
.
<em>You can stop here if this is what the problem is asking for. However, it is not fully simplified.</em>
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3) Factor the equation. This should leave you with
&
.

Step-by-step explanation:




4 hours for 18
7 hours for 25.50
Difference in hours: 7-4 = 3
Difference in cost: 25.50 - 18 = 7.50
7.50 / 3 = 2.50
A. They charge 2.50 per hour.
B. 2.50 x 4 = 10
18 - 10 = 8
The flat fee is 8 dollars
C. 8 + (2 x 2.50) = 13 dollars
y = 2 - x
y(-3) = 2 - (-3) = 2 + 3 = 5
y(0) = 2 - 0 = 2
y(5) = 2 - 5 = -3