SOLUTION: Mary's penny bank is 1/4
full. After she adds 360
pennies, it is 5/8
full. How many pennies can Mary's bank hold?
Algebra.Com
Question 1134964: Mary's penny bank is 1/4
full. After she adds 360
pennies, it is 5/8
full. How many pennies can Mary's bank hold?
Found 3 solutions by Alan3354, MathLover1, jim_thompson5910:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Mary's penny bank is 1/4
full. After she adds 360
pennies, it is 5/8
full. How many pennies can Mary's bank hold?
==============
5/8 - 1/4 = 3/8
---
360 pennies is 3/8 of the bank's capacity.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
let’s say Mary's penny bank can hold pennies
if Mary's penny bank is full, we have
After she adds pennies, it is , so we have
...........solve for , both sides multiply by
Mary's bank can hold pennies
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
1/4 = 0.25
5/8 = 0.625
x = number of pennies the bank can hold
0.25*x = amount of pennies we start with
0.25x+360 = amount of pennies we have after adding on 360 more
0.625x = amount of pennies in the bank if 5/8 full
The expressions 0.25x+360 and 0.625x represent the same thing because they both represent the bank being 5/8 full, so we have this equation:
0.25x+360 = 0.625x
Solve for x
0.25x+360 = 0.625x
0.25x+360-0.25x = 0.625x-0.25x subtract 0.25x from both sides
360 = 0.625x-0.25x
360 = 0.375x
0.375x = 360
0.375x/0.375 = 360/0.375 Divide both sides by 0.375
x = 960
Answer: The penny bank can hold 960 pennies
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