Need remembering how to solve f(x)=5x2

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

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.