Factor the following polynomial completely.
-x^ 2 y^ 2 + x^ 4 + 9y^ 2 - 9x ^2
, you.

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

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?

Yvaries directly as x. y =90 when x=6. find y when x=13