All of the expressions that can be used to find 80% of x

Which number completes the inequality? 2/3 < _ < 7/9

Aa at 9 a. m. it at 4 p. m. he a of $28.84.?

There are 1872 steps in a building that has 104 floors. each floor has the same number of steps. a second building has the same number of floors but 2 fewer steps between each floor. how many steps are there between each floor of the second building?