Which of these is a two-step equation?

A. X+9 = 21

B. x = 11 + 2

C. 2x+9 = 21

D. x/3=9

What do the following two equations represent? -2x - 4y = - 3 6x + 12y = 9 -Equal lines -Parallel lines -Perpendicular lines -None of the above

All real numbers are whole numbers True or False?

28 The elevation at ground level is O feet. An elevator starts 90 feet below ground level. After traveling for 15 seconds, the elevator is 20 feet below ground level.

Oliver has one liter of water in a pitcher on the wayto the table oliver spills some oliver has 500 ml left how much did oliver spill write a number equation to show how to solve the problem

If a donut shop sold 150 donuts in 6 hours, and each hour they sold 6 more donuts than the previous hour. What's the total number of donuts they sold in the first 3 hours?

Ms. Lawrence had 550 in her bank account. The next day she withdrew 120 to buy groceries. She deposited 200 two days later. Fout days later she used her debit card to buy new shoes that cost 89.

What would 1.2 be as a fraction

The hypotenuse of a right triangle is always opposite from which of the following? A. acute angle B. my right angle C. obtuse angle D. none of the above

Giorgio surveyed 45 randomly selected shoppers at the mall and found that approximately 24% believe that the food court needs to be remodeled. To the nearest percent, with a confidence level of 99% (z*-score 2.

What is the perimeter of a polygon with vertices at (-2, 1) , (-2, 4) , (2, 7) , (6, 4) , and (6, 1) ? Enter your answer in the box. Do not round any side lengths. units