Which of the following equations is written in standard form?
a.
-2x=13
b.
3x+5y=-15
c.
1/2x+1/3y=1/5
d.
-3x+13y=25

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

How can you find the mean absolute deviation (mad) for this set of data?

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?