Which polygon is always regular?

triangle

rectangle

octagon

square

Solve the system of equations. 4x+2y+5z=8 5x+3y+4z=9 6x+3y+3z=3 A) (x=-3, y=6, z=1) B) (x=-5, y=8, z=3)

How do you figure out 3 1/3 minus 2 2/5

What is 1 4th of a year in weeks

Gerald graphs the function f (x) = (x - 3) 2 - 1. Which statements are true about the graph? Select three options. The domain is x. The range is y ≥ - 1. The function decreases over the interval (-∞, 3). The axis of symmetry is x = - 1.

The smiths built a pool in their backyard. When the contractor left the pool was 5/9 full. The contractors directions were to fill it 8/9 full. How much more must they fill the pool?

What is the number of possible combinations of 14 objects taken 3 at a time?

Write an equation in two variables in the standard form that can be used to describe the velocity of the car at different times. Show your work and define the variables used.

Which table shows a negative correlation?

A circle with circumference 12° and a 48 degrees central angle. What is the length of the arc?

Caleb made a stack of popcorn balls on a table. He placed 16 on a table then added three more layers on top of them. Each layer had four fewer balls than the previous layer. How many popcorn balls were in all in the stack