Use the interactive graph to plot each set of points. Which sets represent proportional relationships? Check all that apply.
(1, 4), (3, 8), (5, 9)
(3, 2), (6, 4), (9, 6)
(2, 2), (4, 4), (6, 6)
(1, 3), (2, 7), (3, 8)
(0, 0), (1, 2), (2, 4), (4, 8)

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d. c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft