How many groups of 3 students can be chosen from a class of 15?

A. 45
B. 455
C. 2,730
D. 3,375

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Which representation has a constant of variation of -2.5

Which of the following represents the factorization of the trinomial below? x^2+7x-30