What is the probability that a randomly chosen exam score is less than 300 or greater than 700?

What is the quadric regression equation that fits these data

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

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