Write an expression to represent that area of the figure.

a 4x+6

b x2−4

c x2+3x−4

d x2+5x−4

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?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)