Simplify the expression and identify which property is used in each step. (.85 + .50 + .15) - .30

Enter the missing numbers in the boxes to complete the table of equivalent ratios. time (min) distance (km)? 36 9? 1512 ?

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?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.