Determine the y-intercept of the quadratic function f(x)=3(2x+1)(x-4).

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.