There are 40 boys in a computer club. the ratio of girls to boys is 2 to 5. how many girls are in the club?

What is the first step of an indirect proof of a number that is divisible by two

What is sin 7x/4 ? i need on this urgent trig

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?