find the differnce of 28y-16y

find the differnce of 28y-16y

An exam worth 145 points contains 50 questions. Some of the questions are worth two points and some are worth five points. How many two point questions are on the test? How many five point questions...

I don't understand,what so ever. Please help.

I have 5 questions so I will be posting for a minute.

the line passes through (8,-3) and is parallel to the line whose equation is y=2x+3

in using the functions given I have to figure out the determined slope and the y-intercept

I really need help on this