Which of the following is the standard deviation of the random variable x, the number that appears on a die, if the probability of any number on a fair, 5-
sided die is ?
O A. 2.5
O B. 1.414
O C. 0.2
O D. 1.581
SUBMIT

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

X+ y = 5 ; x - y =3 solve using linear combination

If the discriminant if a quadratic equation is 4 which statement describes the roots?