Question

A purse contains $4.70 in nickels and quarters. There are 30 coins in total. how many nickels and quarters are there?

Answer 1

n + q = 30
.05n + .25q = 4.70

now it can be solved by substitution. Can you do it now ?

Answer 2

Yes, thanks for the help.

Answer 3

do you have any questions about the equations ?

Answer 4

Yes, since there are 2 variables what do I do to actually get the answer?

Answer 5

substitution..
n + q = 30....n = 30 - q
so sub in 30 - q for n back into the second equation. This will allow you to solve for q. You can then sub that answer back into the first equation and solve for n

Answer 6

oh, okay. Thanks.

Answer 7

sure thing :)