Posted by Jessica on .
A plumber charges $45 for a service call, plus $70/h for her time.
a. Find the cost of a two hour service call.
b. How long was a services call that cost $150?
Also .......
as the weight held by a spring increases, the length of the spring increase proportionally. suppose a 2lb weight stretches a spring to 15 in., and a 12lb weight stretches the same spring to 20 in. what is the length of the spring with no weight attached?

Math 
Henry,
a. C = 45 + 70*1 = $115 = Cost.
b. 45 + 70X = $150,
70X = 150  45 = 105,
X = 1.5h.
Jessica, check your 41811,2:45pm post 
Math 
ho le chong,
sooka my dik

Math 
Ping Pong Ding Dong,
sook me hary bllz

Math 
Anonymous,
slope of the line through A(2, 6) and B(8, 1)?