Astudent needs at least 80% of all points on the tests in a class to get a b. there are three 100-point tests and a 250-point final. the student's test scores are 72%, 85%, and 78% for the 100 point tests. what is the least score the student can make on the final and still get a b?

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