Consider the quadratic function f(x) = 2x2 – 8x – 10. The x-component of the vertex is?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Through non-collinear points there is exactly one plane.

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?