Seth solved a quadratic equation. His work is shown below, with Step 3 missing. What could Seth have written as the result from Step 3? 1/2 (x - 1)^2 + 5 = 23

Step 1. 1/2 (x - 1)^2 = 18
Step 2. (x - 1)^2 = 36
Step 3.
Step 4. x = -5 or x = 7​

Which statements regarding efg are true? check all that apply.

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.

If you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain.