What is the solution for the system? use the graph below
y-x=-3 (line a)
y+x=3 (line b)

a. (0,3)
b. (-3,0)
c. (0,-3)
d. (3,0)

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?

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6