Y=x^2-2x-15. What is the vertex of the parabola?

The price of a box of 15 cloud markers is $12.70. the price of a box of 42 cloud markers is $31.60. all prices are without tax, and the price of the packaging is the same for any size. how much would 50 cloud markers in a box cost? write an equation which will tell the price p for the number n markers in the box.

The graph is supposed to show f(x) = 3 sin (x/4+1) - 1/2. which of the following are correctly represented in the graph? select all that apply.

Using the properties of equality, find the value of x in the equation below. 4x(2 + 8) = -8 type your answer as a fraction so that you give the exact answer not an estimate.