Algebra
posted by misty .
If Rick’s Automotive charges $50 plus $15 for each (15min) unit of time when making a road call. Twin City Repair charges $70 plus $10 for each unit of time. Under what circumstances would it be more economical for a motorist to call Rick’s? show all work

for charges,
r = 50 + 15m for m units
t = 70 + 10m
you want
r < t
50 + 15m < 70 + 10m
5m < 20
m < 4
so, if the call lasts less than an hour (4 units of 15 min. each) it will be cheaper to call Rick.
Respond to this Question
Similar Questions

math
how would i write a equation if the company charges $38 for a house call and $26 per hour. the cost of a repair is a function of the time spent by the repair person. 
math
how would i write a equation if the company charges $38 for a house call and $26 per hour. the cost of a repair is a function of the time spent by the repair person. 
algebra 2
Two snow resorts offer private lessons to their customers. Big Time Ski Mountain charges $5 per hour plus $50 insurance. Powder Hills charges $10 per hour plus $30 insurance. For what number of hours is the cost of lessons the same … 
prealgebra
Linda would like to hire a clown to perform at her son's birthday party. Clown city charges $100 for incidentals plus $30 per hour for hiring a clown to perform. Party performers charges $120 for incidentals plus $25 per hour. How … 
MathAdvanced PreAlgebra
A computer repair shop charges a flate rate of 50$ plus $35 per hour spent repairing each computer. LEt h be the number of hours spent repairing a computer. Use function notation to write an equation that gives the total charges for … 
Algebra 2
Plan A charges $5 per minute plus a one time monthly fee of $75 and plan B charges $7 per minute, plus a one time monthly fee of $25. After how many minutes will the total cost of the two equations be the same? 
math
Jamia is deciding between two longdistance telephone plans: • Plan A charges $5 per month plus 6¢/min. • Plan B charges $20 per month plus 1¢/min. Jamia usually makes about 200 min of long distance calls each month. Which plan … 
Algebra
An emergency plumber chargers $65 as a callout fee plus an additional $75 per hour. He arrives at a house at 9:30 and works to repair a water tank. If the total repair bill is $196.25, at what time was the repair completed? 
Algebra 2
Juan is comparing the cell phone plans shown in the advertisement. Plan A charges a $15 monthly fee plus $0.40 per min. Plan B charges a $30 monthly fee plus $0.25 per min. For what number of minutes of use do the plans cost the same? 
Math
Randolph runs a home appliance repair business and charges a service call fee of $85 plus $15 per half hour for his labour. Write an equation for calculating the total charges, C, in terms of hours of labour, H. Plot the graph of C …