Well If you mean't 15 1/2 it is 15.5 This is because a decimal is made for parting using place values like tenths, hundredths, thousandths, etc. The 1/2 part is is .5 because 5 is half of 10.
*I explained a bit more in the comments of my answer.
No..... (I'm just adding so brailny accepts it)
Answer:
x = 3
Step-by-step explanation:
720x + 10 = 2170
=> 720x = 2160
=> x = 3
Hoped this helped.
Y=2x+2 because the starting point it positive 2 and goes up 1 over 2
