Question

Jimmy has seven times as many dimes as nickels. Their value is $3.75. How many nickels does he have? he has 5 nickels?

Answer 1

@gypsy1274

Answer 2

Sorry, Write the equation using x for the number of nickels.

Answer 3

5n +35d =3.75

Answer 4

Jimmy has seven times as many dimes as nickels ->d = 7n

Answer 5

We know that nickels are worth $0.05 and dimes are worth $0.10 -> 0.05n + 0.10d = 3.75

Answer 6

i see .05n +.10d=3.75

Answer 7

Now, substitute.
You want to know the number of nickels so substitute 7n for d in the second equation.

Answer 8

0.5+.10 7n=3.75

Answer 9

I would put that 7n in parenthesis so you don't get confused

Answer 10

ok .5+.10(7n)=3.75

Answer 11

Your answer was correct so I'll write out the equations for you.
\(d = 7n\) and \(0.1d + 0.05n=3.75\)
\(0.1(7n)+0.05n=3.75\)
\(0.75n=3.75\)
\(n=5\)

Answer 12

ok thank you.

Answer 13

you should be a teacher gypsy :)

Answer 14

I am a tutor. I will never be a classroom teacher. Too many rules and restrictions.

Answer 15

@texaschic101 Thanks.

Answer 16

you have a lot of patience

Answer 17

Only for those trying to learn. @TheGstudent23 is the perfect example.