Which of the following are identities check all that apply a. cos(x+y)-cos(x-y)=2cosxcosy b. sin(x+y)+sin(x-y)=2cosxsiny c. cos(x+y)+cos(x-y)=2cosxcosy d. tan(x-pi)=tanx

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Find the distance of the blue line between the two labeled points. round to the nearest hundredth. a) 7.07 b) 7.21 c) 10 d) 5.12

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price