There 20 colored pencils in a box: 4 red, 5 green, 10blue , and 1 black. you pick a pencil without looking. what is the sum of the probability of picking a red pencil and the probability of picking a black pencil

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2

Usan threw a softball 42 yards on her first try and 5112 yards on her second try. how much farther did she throw the softball on her second try than her first? express your answer in feet and inches. 9 ft 12 in. 28 ft 12 in. 28 ft 6 in.

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )