1st one i see is b
2nd is a
3rd is b
This is the isosceles right triangle, the diagonal of a square, the thing that so upset the Pythagoreans. The two sides and diagonal of a square are in ratio
so we get

We could have also gotten this using Trig:


Or by recognizing u=v because remaining angle is 45 so this must be isosceles so



The number of TVs sold was 5 more at Store A than at Store B
not enough info given to support the other statements