Compute the standard deviation of the following set of data to the nearest whole numbers

8, 12, 15, 17, 18

A).3
B)4
C)13
D)14

Which system of linear inequalities is graphed? can somebody pleasssse

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 of the following is the graph of y= square root -x-3