You can't say he is correct. 3:1 in when mixing a solution is not the same as 1:3. if you change the direction of the ratio you change the formula. 1 part cleaner to 3 parts water is totally different than
3 parts cleaner to 1 part water

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?