What is 4 squared ? 4^2

Find the value of the variable and the length of each secant segment.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)