The equation you had:
6x + 5y = 45
Solve for Y:
5y = (-6x) + 45 divide by 5
y = (-6/5)x + 9
y = -1 1/5x +9
Answer:
The current is 34 mph in still water, I think I could be wrong.
\left[y \right] = \left[ 81+32\,x\right][y]=[81+32x] being converted to vertex form
15% off means 85% on so I would use .85x · 6 = total monthly cost to represent this problem. The dot represents times (I did not want to confuse things by using x)
Other ways to express this:
6 x .85x
6(.85x)
.85x (6)
I believe the answer is c and have a very nice day
