3. if set a = {-5, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8}
set b = { x: x= 2y +1 and ye w}
find (1) a-b and n(a-b), (ii) b - a and n(b - a) answer it with steps and details, !

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.