Elijah ate trail mix nine different times. each x on the line plot represents an amount that he ate. how much total trail mix, in cups, did he eat? a. 9/2 b. 15/2 c. 9/4 d. 15/4 i will mark brainliest to the most specific and true answer!

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee