Question

There are nickels and quarters worth $2.20 in total. If there are 28 coins, how many nickels are there?

Answer 1

Let
n = number of nickels
q = number of quarters

`there are 28 coins` so
n+q = 28

Solve for q to get

q = 28 - n

With me so far?

Answer 2

ok

Answer 3

that's it ?

Answer 4

`There are nickels and quarters worth $2.20 in total`

so we know the other equation to be

0.05*n + 0.25*q = 2.20

Answer 5

ok

Answer 6

Now plug in q = 28 - n

0.05*n + 0.25*q = 2.20

0.05*n + 0.25*(28 - n) = 2.20

solve for n and tell me what you get

Answer 7

wait ook

Answer 8

24

Answer 9

good, now use this to find q

q = 28 - n

plug in n = 24

Answer 10

4?

Answer 11

n = 24
q = 4


so there are 24 nickels and 4 quarters

Answer 12

my answer is 24 or 4 ?

Answer 13

Go back to what it's asking `If there are 28 coins, how many nickels are there?`

Answer 14

oh 24

Answer 15

yes

Answer 16

Thank you,
You are a life saver

Answer 17

i am posting another question