If cosx+sinx=sqrt(2)cosx then show that cosx-sinx=sqrt(2)sinx

The contents of 3838 cans of coke have a mean of x¯¯¯=12.15x¯=12.15. assume the contents of cans of coke have a normal distribution with standard deviation of σ=0.12.σ=0.12. find the value of the test statistic zz for the claim that the population mean is μ=12.μ=12.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.