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.

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

idk man good luck man

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

a is the right answer