Answer:
7.97%
Step-by-step explanation:
Given data
Original Salary= $32,000
Increase= $2,550.00
percent increase= increase/original *100
Percent increase= 2,550.00/32000*100
Percent increase= 0.0796875*100
Percent increase= 7.97%
Hence the increase is 7.97%
the last one
plug in -2 for x and -3 for y
12, 15, 18
4x+5x+6x=45
15x=45
x=3
4x=12, 5x=15, 6x= 18