The law of cosines is a^2+b^2-2abcos(c). find the value of 2abcos(c).
a. 37
b. -40
c. 40
d. 20

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?