The second flight of stairs is three times as high as the first flight of stairs. Together they are 72 feet high. How high is the first flight of stairs?

Evaluate expressions 8+7*5=

12x + 4y = 152 what represents x and y

What's is the expression of 36:9

6. Evaluate: 14 x 3.5

Which of the following is NOT true when testing a claim about a proportion? Choose the correct answer below. A.

Will give brainliest + 5 star rating! Which polynomial is written in descending order? A. 9-3x+4x² B. - 3x+9+4x² C. 4x²-3x+9 D. 4x²+9-3x

Mia's workout routine is to swim for 100 minutes 3 times a week, jump rope for 1 minute 7 days a week, and run for 10 minutes 2 times a week. What is the total time that Mia's workout routine takes each week?

12 oz. to 3 lb. as a fraction in simplest form

Which is the slope of a line parallel to the line 5x-3y=5?

What's the solution for 2x 7y=2 x y=-1