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.

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Step-by-step explanation: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.

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

about 168 miles

step-by-step explanation: