There are 8 white marbles and 4 green marbles in a bag express the ratio of green marbles to white marbles as a fraction reduced to lowest terms?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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?

Someone me! if you’re smart you can solve this!