Answer:
No, he doesn't it would be 5 cents over the amount of money he has.
Cosine is

which applies to a right triangle. I hope that helps you.
Answer:
C (y=5x-7)
Step-by-step explanation:
First, you find the slope between the 2 points which is 5, then you use one of the points to form an equation.
You then find it's y=5x-7.
Answer:
(x,y) = (4,3)
Step-by-step explanation: