Longer piece=2x+1
shorter piece=x
2x+1+x=16
3x=15
x=5
The shorter piece is 5ft and the longer is 11ft
Did that help any?
The points represented are:

The domain is the set of all the inputs, i.e. the set composed by the x-coordinates of these points.
The range is the set of all the outputs, i.e. the set composed by the y-coordinates of these points.
This relation is a function, because you never map two outputs for the same input (i.e. you don't have two points with the same x-coordinate, but different y-coordinates).
Answer:
im pretty sure #9 is just y=7x... it should be parallel with y=7x-3 since it has y intercept of 0 rather than -3.
Answer:
The car going 1232 inches per second because 65 miles per hour is only 1144 inches per second.
Step-by-step explanation: