Which pair of equations represents two perpendicular lines? option a: -3x +2y = 10 and 3y = 2x +12 option b: 2x + 5y = 45 and y + 2/5x = -9 option c: x= 4y +4 and x +4y=4 option d: 7x + 4y= 20 and y-3=4/7x

I’m stuck on this i don’t understand.

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.

The table below represents a linear function f(x) and the equation represents a function g(x): x f(x) −1 −5 0 −1 1 3 g(x) g(x) = 2x − 7 part a: write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points) part b: which function has a greater y-intercept? justify your answer. (4 points)