Write the integer for 3 feet below sea level

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0