Prove that cos5x = 16cos^5x -20cos^3x +5cosxplease do it neatly on a paper, best answer will be marked BRAINLIEST!

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

The graph shows the distance kerri drives on a trip. what is kerri's speed?