Answer:
m = -8
Step-by-step explanation:
Use the slope formula: 

m = -8
We can compare by converting Johnny's reading time into the same unit of Jacky's, hours.
There are 60 minutes in an hour, so use this:

15 < 20, so Johnny read faster. This is 5 pages faster per hour than Jacky.
M1= -5 , m2 = 5 inorder to get this you move the constant to the right take the root of both sides separate the solutions and you should get m1= -5, m2 =5
Answer:
Just units
Step-by-step explanation:
Looking for perimeter, not area and volume