The vertices of a triangle are

a(-4,5)
b(-4,1)
c(-1,1).

rotate the triangle 180 degrees about the origin. what are the coordinates of a'?

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?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?