Question

An electronic repair shop offers three types of service: on-site, at-store, and by-mail. On-site service costs 3 times as much as at-store service. By-mail service costs $10 less than at-store service. Last week, the shop completed 15 services on-site, 40 services at=store. and S services hy mall for hotal cales of t26s0 Compiete ALl parts. SHOW ALL WORK FOR FULL CREDIT.

Define variables for each service.

Answer 1

To calculate the equation representing the total cost of the services completed, let x = number of on-site services, y = number of at-store services, and z = number of by-mail services. The equation is then 3y(15) + y(40) + (y - 10)(S) = 260.

Step-by-step explanation:

Let's define the variables:

x = number of on-site services

y = number of at-store services

z = number of by-mail services

The cost of on-site service is 3 times the cost of at-store service, so the cost of on-site service is 3 times y: 3y

The cost of by-mail service is $10 less than the cost of at-store service: y - 10

Last week, the shop completed 15 on-site services, 40 at-store services, and S by-mail services for a total of $260:

3y(15) + y(40) + (y - 10)(S) = 260

This equation represents the total cost of the services completed last week.