manandharmuna029 manandharmuna029

30-12-2020
Mathematics

contestada

the cost of 5 books and 4 pens is 115. if the cost of 1 book is RS 15 ,find the cost of 7 pens

Respuesta :

account001 account001

30-12-2020

Answer:

The cost of 7 pens is RS 70

Step-by-step explanation:

Let c=the cost of one book and p=the cost of one pen

5b+4p=115

b=15

5(15)+4p=115

75+4p=115

4p=115-75

4p=40

p=40/4

p=10

7p=7*10

7p=70

The cost of 7 pens is RS 70

Answer Link

Otras preguntas

Test Record Observations/Results Against Resistance Feel for Muscle Contraction Cranial nerve(s) tested Name and Roman Numeral Elevate and depress shoulders aga

After completing initial diagnostic procedures and allocating system resources, a startup BIOS program checks for information about secondary storage devices th

Which function describes this graph

explain why resistors connected in parallel are called current dividers

Here is data on the percentage of 200 hotels in each of the three large cities across the world on whether minibar charges are correctly posted at checkout are

Question 2 of 10 What did Lincoln hope to do about voting after the Civil War? O A. Extend voting to Native Americans living in the West B. Stop all Southern me

A survey found that 8 out of 10 parents approved of the new principal’s performance. If 4 parents name are chosen with replacement what is the probability they

Can somebody help me

holaaa soy nuevo siganme y sigo

describe the location of the Philippines