Solve for x in the equation x + 10 = 15.

a. x = 25
b. x = 5
c. x = −5
d. x = 10

What is the area of triangle abc if a = 8, b = 11, and c = 15?

The table above shows approximate conversions from gallons to liters. what is the value of x?

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?