Ana read 7 books. Each book had 5 chapters. She read the same amount of chapters every day for "n" days

Select the lengths in centimeters that would form a right triangle

How to use order of operation in 20 divide by 4 multiply 5 = 1

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?