Ten pounds of mixed birdseed sells for 8.24 per pound. the mixture is obtained from two kinds of birdseed, with one variety priced at 5.68 per pound and the other at 8.88 per pound. how many pounds of each variety of birdseed are used in the mixture?

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