anonymous
  • anonymous
ra has 28¢ in his pocket. He has 20 coins that are either pennies or nickels. How many nickels does Ira have? Explain and show your work. *
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
how many cents are there in a nickel and a penny.? (i'm from the UK)
anonymous
  • anonymous
a penny is one cent and a nickle is 10 cents
anonymous
  • anonymous
oops nicke is 5 cents

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More answers

welshfella
  • welshfella
ok so if there are x pennies and y nickels then we have the equation x + 10y = 28
welshfella
  • welshfella
x + 5y = 28
anonymous
  • anonymous
thank you
welshfella
  • welshfella
now we have to fit while numbers to that equation
anonymous
  • anonymous
okay
welshfella
  • welshfella
oh also he has 20 coins so that is x + y = 20 so we need to solve the system x + y = 20 x + 5y = 28
welshfella
  • welshfella
now if we subtract equation 1 from equation 2 the x will disappear and w'ell get 4y = 8
anonymous
  • anonymous
so first i would multiply then add right?
anonymous
  • anonymous
okay
welshfella
  • welshfella
you have 4 times the number of nickels = 8 so divide by 4
welshfella
  • welshfella
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anonymous
  • anonymous
okay one min
anonymous
  • anonymous
4 X 2 = 8
anonymous
  • anonymous
y = 2
welshfella
  • welshfella
no its 8 divided by 4
anonymous
  • anonymous
2
welshfella
  • welshfella
yes
anonymous
  • anonymous
ok so 8 divided by 4 =2
anonymous
  • anonymous
thats the answer right?

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