The total area, in square inches, of a picture in a picture frame is calculated by the expression of 4x^ + 16x + 15, where x is the width of the picture frame. Which of the following are factors of 4x^ + 16 + 15? Select all that apply:
a. (x+1)
b. (x+5)
c. (2x+3)
d. (2x+5)
e. (2x+15)
f. (4x+1)
g. (4x+3)
h. (4x+15)

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. the arena wants the probability of being shortlisted to be 0.14. what is this as a percentage and a fraction? what is the probability of not being shortlisted? give your answer as a decimal. those shortlisted are entered into a final game of chance. there are six balls in a bag (2 blue balls, 2 green balls and 2 golden balls). to win, a company needs to take out two golden balls. the first ball is not replaced. what is the probability of any company winning advertising space on their volley ball team jerseys?