Subtract
1 2/5 - (-3/5)
enter your answer in simplest form

Which statements about these triangles is true

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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?