What is the median of this data set ? 21,42,63,84,105,126,147

a.21
b.63
c.84
d.126​

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.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points