8x - 9y = 11
Subtract 8x to both sides:
-9y = -8x + 11
Divide -9 to both sides:
y = 8/9x - 11/9
or
y = 8/9x - 1 2/9
The answer is D because when you insert it into a calculator it gives you D. Yet, if you do it manually you still get the same number .
m=-6 and y-int of (0,5) gives you y = -6x + 5.
Looking through those other equations, you're looking for variations of that equation.
#1 is NOT.
#2 IS, because -6x + 5 is the same as 5 - 6x.
#3 is NOT.
#4 is NOT.
#5 is NOT.
#6 is NOT.
It looks like #2 is the only one.
9514 1404 393
Answer:
7 1/3 hours
Step-by-step explanation:
We are to assume that the total number of heater-hours required is a constant. That is, the time is inversely proportional to the number of heaters.
If the number of heaters goes up by a factor of 6/4 = 3/2, then the number of hours will go down by the inverse factor: 2/3.
With 6 heaters instead of 4, the time required is (2/3)(11 hours) = 7 1/3 hours.
