I am having cofusion with a and b pls help thx

a.

Let x = # of hours

Let y = cost to rent skates

3 + 2x = y

b.

(Plug in 8 for x, because it is the # of hours)

3 + 2x = y

3 + 2(8) = y

(PEMDAS or order of operations)

3 + 16 = y

19 = y

It costs $19 to rent skates for 8 hours.

if you was gonna solve for a, a is a   < -12