Four students out of a class of 18 are being selected to represent the class at the school-wide spelling bee. how many different groups of 4 can be selected

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)