because 0.75 is the flat rate of the amount of money it takes to make a call... and 0.25t is how much money it will take based on how long the call us.
First we raise both members of the equality to the square: (√-4x) ^ 2 = (100) ^ 2 Then, we solve: -4x = 10000 We cleared x in the last instance x = 10000 / (- 4) x = -2500 answer: the solution of √-4x=100 is A) x = –2500
