A total of 800 advertisements were sold for a certain magazine. If 40 percent of the first 150 sold were in color, 60 percent of the next 400 sold were in color, and 80 percent of the last 250 sold were in color, what percent of the 800 advertisements were in color?

What is x3+3x2−16x−48 divided by x−1?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?