Question

What is the algebraic expression that describes the monthly pay? Let x be the hours of training.

A. 10x+1200
B. 1200x+10
C. 120x+100
D. 10x+120

Answer 1

see which equation the values fit.

eg A
10 hours: so monthly pay is 10*10 + 120 = 1300
0
Looks good so far try the other values

Answer 2

For every 10 hours of training, monthly pay increases by 100
that means that for every 1 hour, monthly pay increases by 10
so the answer must be in the form 10x + something
let's take the 1st row in the table:
10 hours of training = 1300 monthly pay
10x+ something = 1300
10*10 + something=1300
something = 1200
therefore, monthly pay = A. 10x+1200