Abag contains 80 marbles: 20 red, 20 blue, 20 yellow, and 20 green. what is the probability that the first 4 marbles randomly selected, without replacement, are all different

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Consider the function f(x)=-5x+3 what is f(-2)

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.