Keiko has seven colors of lanyard. she uses three different colors to make a chain. how many different combinations can she choose?

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

For questions 1–3, use the differential equation given by dx equals x times y divided by 3, y > 0.

For the line segment whose endpoints are r(1, 2) and s(6, 7), find the y value for the point located 3 over 4 the distance from r to s. (6 points)