What is the positive square root of 81?

Aquadratic function f(x) has a turning point at (3,-7). what is the turning point of -f(x)?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83