Tran says that -1/4x-7+9/4x+2x is equivalent to 4x-7. How can substituting any value for x help you determine whether Tran is correct? Is Tran correct? Use substitution to justify your answer

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?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Arational number that is equivalent to -20/4?