The expected lifetime of a television is 18 years with a standard deviation of 4. use chebychev's inequality to estimate the probability that television will last between 9 and 27 years. a) 0.2435b) 0.1975c) 0.7334d) 0.8025e) 0.8504f) none of the above.

If you answer right ill give brainliest, : )

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

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