How does energy travel in a mechanical wave? a. in a medium b. in space c. in time d. in a vacuum

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

Which number line represents the solution set for the inequality -1/2x> 24?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15