Find the length of c using the phthagorean theorem

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

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

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way