3, -5, 11, -21, how does each term relate to the next term? a) subtract 8. b) multiply by -2 and add 1. c) multiply by -3 and add 4. d) multiply by 2 and subtract 1.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2