Question

A pencil costs p cents and a ruler costs r cents.
Write an expression for the total cost of 5 pencils and 7 rulers.

Answer 1

Answer:

5p+7r

Step-by-step explanation:

per pencil cost = p

per ruler cost = r

5 pencil cost= 5p

7 ruler cost=7r

Expression- 5p+7r

Answer 2

Question :

The total cost of 5 pens and 10 pencil is Rs 30. If a pen costs Rs 3 more than a pencil, find the price of each item.

Answer :

Given total cost of 5 pens and 10 pencil = Rs 30

5 pens + 10 pencils = 30

pens + 2 pencils = 1

also given pen cost 3 more than a pencil

i.e, pen = 3 + pencil.

pen - pencil = 3

pens + 2 pencils = 6

_______________

-3 pencils = -3

pencils = 1

pen - 1 = 3

pen = 4

cost of pencils = 1 cost of pen = 4

Hope it helps you❤❤