a. 60(h)+40=
b 60(3)+40=
180+40=$220
c. 400=60(h)+40=
360=60(h) *divide 60 on each side*
6=h, 6 hours
Markup = profit/ cost*100% Markup= 50 you could double check
Y=1 and x=7 because if you make the first equation into a x= equation, you can just substitute it for the second equation and solve it.
Here is your function graphed
