David read 40 pages of book in 5 minutes. how many pages will he read in 80 minutes if he reads at a constant rate?

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

Use a transformation to solve the equation. w/4 = 8 can you also leave a detailed explanation on how this equation = 32

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?