There are 10 cents and 5 cents in a bad and a total of 30 coins. Write the expression of total coins in a bag.

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There are 10 cents and 5 cents in a bad and a total of 30 coins. Write the expression of total coins in a bag.

[From: ] [author: ] [Date: 11-10-17] [Hit: ]

. you should be able to handle it from here.......

If the total value of the coins is 200 cents, find the number of 10 cents and 5 cents coins in the bag.

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10x+5y = 200 ----> (1)
x+y = 30 ----> (2)
5x+5y = 150 ----> (3) (2) * 5

5x = 50 (1) - (3)

x= 10
y = 20

so 10 coins of 10 cents n 20 coins of 5 cents

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let the number of nickels = n and dimes = d
n+d=30
10d+5n=200

two equations, two unknowns... you should be able to handle it from here.

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20 of 5 cent coins and 10 of 10 cent coins

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