5. 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 5 services by mail
for total sales of $2650. Find the cost of each repair
service

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

answer:

step-by-step explanation:

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you