There are 20 students in your class. 35 of them pack a lunch. Which method will help you find the number of students in your class who pack a lunch?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?