SOLUTION: A candle burns at a rate of 1 inch per hour. The original height of the candle is 12 inches. The function of the candle burning can be represented by f(x)=-x+12. Find x when f(x)=8

Question 999115: A candle burns at a rate of 1 inch per hour. The original height of the candle is 12 inches. The function of the candle burning can be represented by f(x)=-x+12. Find x when f(x)=8.
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
f(x)=-x+12. Find x when f(x)=8
-------------------
Wherever there's x, sub 8.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A candle burns at a rate of 1 inch per hour. The original height of the candle is 12 inches. The function of the candle burning can be represented by f(x)=-x+12. Find x when f(x)=8.
---
Solve:: -x+12 = 8
-x = -4
x = 4
----------------
Cheers,
Stan H.
-------------
RELATED QUESTIONS
A 12 inch candle and a 24.5 inch candle are lit at 10 am. The 12 inch candle burns 3/2... (answered by jorel1380)
A candle is lit and burns and the length of the candle changes at a constant rate of -1.6 (answered by Boreal)
A candle is lit and burns and the length of the candle changes at a constant rate of -1.9 (answered by ikleyn)
a 9 inch candle burns at a rate of 1/3 inches per hour. a. write an equation in slope... (answered by ankor@dixie-net.com)
A 16-inch candle is lit and burns at a constant rate of 1.4 inches per hour. Let t... (answered by josgarithmetic)
A 16 inch candle is lit and burns at a constant rate of 1.1 inches per hour. Let t... (answered by ankor@dixie-net.com)
A candle burns down at a rate of 2.5 inches per hour. How long will it take, in hours,... (answered by Boreal)
the height of a 9 inch candle changes at a rate of -2/3 inches per hour when it is... (answered by greenestamps)
If a candle has a radius of 1 inch by 8 inches. What is the volume of the candle? (answered by MathLover1)