SOLUTION: Lily has a piggy bank with 100 coins in dimes in pennies she has a total of $7.57 in the piggy bank fill in the missing information in the equations for the system representing thi

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Lily has a piggy bank with 100 coins in dimes in pennies she has a total of $7.57 in the piggy bank fill in the missing information in the equations for the system representing thi      Log On


   

Question 1122462: Lily has a piggy bank with 100 coins in dimes in pennies she has a total of $7.57 in the piggy bank fill in the missing information in the equations for the system representing this problem where d = number of Dimes and p = number of pennies
d+p=100
Ad+Bp=$7.57
What is the value of A?
Found 2 solutions by solver91311, josgarithmetic:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


What fractional part of a dollar is a dime?


John

My calculator said it, I believe it, that settles it

Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
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Lily has a piggy bank with 100 coins in dimes in pennies she has a total of $7.57 in the piggy bank
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1 dime is 0.10 dollar.
1 penny is 0.01 dollar.

system%28d%2Bp=100%2C0.1d%2B0.01p=7.57%29

Multiply the money equation, both sides, by 100 to eliminate the fractions or denominators.

system%28d%2Bp=100%2C10d%2Bp=757%29

You may want to use elimination first to directly solve for d.
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