Find the output of the function y = x - 4 if the input is 21

Write 6.2 as a improper fraction

Give two integers greater than - 8 but less than - 4

There were twelve times more children then adults at the mantinee performance of the school play. There were 455 people at the play. How many adults and children were there?

Ab + c = d solve for c

Josie spent 4/7 of the money in her purse on some money on 18 markers. each marker cost $1.20. how much money was in Josie's purse to begin with

Solve this inequality: 3 (x + 6) - 2 (x + 2) > (or equal to) 10

Is 4/5 greater than 1/3

Martha always tries to exercise at least 30 minutes a day. Write an inequality to represent the number of minutes Martha exercises each day.

A swimming pool has perimeter of 72 feet. The short sides measure 16 feet. What is the length of the longer sides of the pool

At the beginning of an environmental study, a forest covered an area of 1500km2. since then, this area has decreased by 7.1% each year. let t be the number of years since the start of the study. let y be the area that the forest covers in km2.