Add 12xy − 3p2q2 + 7pq − 8r2 and 2xy + 3p2q2 − 8pq + 4r Please help me quick
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Given:
Susie has 34 nickels and dimes. Their total value is $2.35.
To find:
The number of nickels and number of dimes.
Solution:
Let the number of nickels be x and number of dimes be y.
Susie has 34 nickels and dimes.
....(i)
We know that,
1 nickel = $0.05
1 dime = $0.10
Their total value is $2.35.
Multiply both sides by 100.
Divide both sides by 5.
...(ii)
Subtracting (i) from (ii), we get
Putting y=13 in (i), we get
Therefore, number of nickels is 21 and number of dimes is 13.