Ihave 7 minutes is the relation a function? select yes or no for each relation. a) (−2, 1), (−4, −2), (3, 1), and (8,  9) b) (−2, 1), (−4, −2), (3, −2), and (8,  6) c) (−2, 6), (−4, 3), (3, −2), and (8,  6) d) (3, −9), (−4, 1), (3, −2), and (5,  6)

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Anyone know? will mark brainliest if you're correct!

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2