A very old vending machine accepts only nickels (n) and dimes (d). Candy costs up to $0.50, but sometimes the machine will dispense candy without any coins being inserted into the machine. Which inequality shows all of the ways to obtain a candy bar from the machine?

Question

A very old vending machine accepts only nickels (n) and dimes (d).  Candy costs up to $0.50, but sometimes the machine will dispense candy without any coins being inserted into the machine. Which inequality shows all of the ways to obtain a candy bar from the machine?

anonymous · Answer

Also need help with this one...When comparing the graphs of y = x and y > x, what is a difference in the graphs?

anonymous · Answer

Hello, I think it could be $ 0 \le 0.05n + 0.1d \lt 0.5$ where $n$ and $d$ are number of nickels and dimes.

anonymous · Answer

http://gyazo.com/c50e67820bfaeb509b3c0796a9c4b4eb << These are the answer choices.

anonymous · Answer

http://gyazo.com/f80c1d688f4e41714ab3479d9d63a9d7 << For the 2nd question (answers).

anonymous · Answer

The answer of the second question is B. Because graph $y = x$ look like this|dw:1360179286008:dw|
and points that satisfy the equation $ y > x $ are all point that lie above the line $y = x$ but don't lie on the line.

anonymous · Answer

I mean A is the right answer.

anonymous · Answer

Second question is A?

anonymous · Answer

yes it is.