Ten students participated in a raffle to win a new computer. there are two new computers being given away, and two students will be chosen at random, one at a time, without replacement. how many possible ways are there to choose the two students? 45 20 100 90

Simplify the expression. -2/5(10+15m-20n)

Ineed with math stuff it involves graphs

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14