Recognizing the Vertex and Discriminant
Consider the quadratic function f(x) = 2x2 – 8x – 10.

The x-component of the vertex is .

The y-component of the vertex is .

The discriminant is b2 – 4ac = (–8)2 – (4)(2)(–10) = .

Regular price is $77.00 and the discount is 5% find the sale price

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed