What two numbers add to -50 and multiply to 80

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?