Question: How can you test two expressions to make sure they're equivalent? Answer A: Substitute several different values for the variables to see if each set gives identical answers for both expressions. Answer B: Switch the variables to different variables. Answer C: Substitute 0 for all variables. Answer D: Substitute a value for the variables to see if both expressions give the same answer.

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

The ratio of wooden bats to metal bats in the baseball coach’s bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?