What is the common difference of the arithmetic sequence on which the series is based? : 3 + 4.5 + 6 + 7.5 + 9 + 10.5.

Ineed with number 17 i don’t get it at alll

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)