Which of the given pairs of expressions are equivalent? select all that apply.
a. 3z + 2z and 5z
b. (8x – 8x) – y and 0
c. 9.1 + 4.5a – 2.5a and 11.1a
d. -7y(3) – 3 and 0
e. y – 6(3) and y – 18

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?