Rashida keeps her collection of 96 books on three shelves -there are 24 books on the first shelf
-there are x books on the second self
-the number of books on the third shelf is 3 times the number of books on the second shelf
what is the value of x the number of books on the second shelf
a 16
b 21
c 18
d 24

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

What percent of 18 is 24? and plz explain thx.