Solving Two-Step Equations Quiz Active TIME 5 2 Which equations have the same value of x as X+5=-9? Select three options. -9 X+ 3--9(6) 5x+4=-54 5x+4=-9 5x=-13 5x=-58 Next Save and Exit Sub Mark this and return M​

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.