Help me plz Itz for a big test

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.

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)