Which of these is an even function? A. f(x) = 5x2 - x
B. f(x) = 3x3 + x
C. f(x) = 6x2 - 8
D. f(x) = 4x3 + 2x
Math

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

How can you construct perpendicular lines and prove theorems about perpendicular lines