Question

Mary has 5 more dimes than nickels. Her coins are worth more than 1.60. At least how many nickels does she have?

Answer 1

d = 5 + n
.10d + .05n < 1.60

Answer 2

I got 10 nickels.. @tabby2014

Answer 3

I messed up in my equation above, it should be > not < sorry

So, I think it should be 8 because if n = 8 then d = 13 and if you substitute those for the bottom equation:
.10(13) + .05(8) > 1.60
1.70 > 1.60

Answer 4

If she had one less nickle, her change would only be 1.55, that's why it can't be less than 8

Answer 5

ohhh...okay

Answer 6

Hope that helped!!