Simplify the expression 2x(4 + x - 9 + 3x) A. 8x - 10
B. -2x²
C. -10x²
D. 8x² - 10
E. 8x² - 10x

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

Arational number that is equivalent to -20/4?