Of 400 college students, 115 are enrolled in math, 225 are enrolled in english, and 55 are enrolled in both. if a student is selected at random, find the probability of the following. the student is not enrolled in english or is enrolled in mathematics.

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Simplify the algebraic expression 8y-2(y+4)