Use trigonometric identities to solve each equation within the given domain. 4cos4(x) – 5cos2(x) + 1 = 0 from [0, 2π). PLEASE SHOW WORK!!!

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !