Which inequality is equivalent to 10x – 5y ≤ 30? y ≤ -2x + 6
y ≤ -2x - 6
y ≥ -2x + 6
y ≥ -2x - 6

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?