Dr. Potter provides vaccinations against polio and measles. Each polio vaccination multi-dose vial
consists of 44 individual doses, and each measles vaccination multi-dose vials consists of
22 individual doses. Last year, Dr. Potter used a total of 60 multi-dose vials that consisted of a total of
2024 individual doses.
How many individual polio and measles vaccinations did Dr. Potter give, respectively?

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