Question

Your piggy bank has a total of 41 coins in it; some are dimes and some are nickels. If you have a total of $3.45, how many nickels do you have?

Answer 1

13 nickles?

Answer 2

why you asking me?????

Answer 3

Why not?

Answer 4

@UsukiDoll

Answer 5

is it 13?

Answer 6

1] find out how much a nickel is equal to

Answer 7

d = dimes n = nickels
10c = 1 dime 5c = 1 nickel

$3.45 = (10) dimes + (5) nickels

\(\bf 3.45 = 10d + 5n\)

there are a total of 41 dimes and nickels
so \(\bf d+n=41\)

Answer 8

solve the system of equations by susbtitution

Answer 9

hmmm ... actaully the 1st equation should be in pennies... .thus \(\bf 345=10d+5n\\ d+n=41\)

Answer 10

say... solve the 2nd equation... by "n"... how does it look?