Somebady come help me~ Or ima fail this assesment ~ =>=

Use the multiplier method to incrases £258 by 43%

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

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b