Abubblegum machine has 25 red gum balls, 30 green gum balls, 15 yellow gum balls, and 20 blue gum balls. If Aliijah puts 1 quarter in the
machine and get 1 gum ball, what is the probability the gum ball is NOT
green?

The triangles are similar. what is the value of x? show your work.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)