Neil predicts the planet Saturn has 78 moons. If Saturn actually has 63 moons, what is Neil's percent error? Round your answer to the nearest tenth of a percent.

Which of the following contains a variable?

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.