Macy has a 70% average in her class going into the final exam she says I need to get 100% on the final so I can raise my score of 85% is she correct

How to write 3 tenths and 5 tenths as a decimal

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?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)