Determine if triangle rst with coordinates r(2, 3), s(4, 4), and t(5, 0) is a right triangle. use evidence to support your claim.

In the diagram below, dab and dac are adjacent angles. if mdac = 25°, what is mdab in degrees? what is mbac in degrees?

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?