5/8 + -3/4 i don’t know this

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?

Goods include kennels, leads, toys and similar accessories for pets what's percentages about what's percentages of the total amount spent on goods for $4736

On the blueprint of a house, 42 millimeters represents 8 meters. the actual lehenth of the living room is 5 meters. what is the length on the blueprint