An infinite geometric series has a first term a1 = 15 and a sum of 45. Explain how you can use the formula S = a1/1-r to find the value of the common ratio. What is the value of r?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Find the zeros of each function. f(x) = x^2 + 5x - 6

What would the rule be for the reflection of y=-3