1 -1 2 :4
0 1 -1 :2
0 O 1 : -2

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle