Which absolute value statement describes a 40 yard gain in football?
a) |40| = 40
b) |-40| = 40
c) -|40| = 40
d) -|-40| = 40

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13

What is the sum of the measures of the interior angles of an octagon