Which of the following are identities? Check all that apply. A. sin(x + y) + sin(x - y) = 2cosx siny
B. cos(x + y) - cos(x- y) = 2 cos xcosy
C. tan(x - 7T) = tan x
O D. cos(x + y) + cos(x - y) = 2cos x cosy

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

Why is x= 4 a solution to the proportion 14/x 56/1 6