Can someone me with number 7? ? i will give brainliest!

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

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Find the distance between c and d on the number line c=3 and d=11