Calculate the Mean Absolute Deviation of these data.

12, 8, 15, 5

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

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