Which of these transformations are isometries? the diagrams are not drawn to scale.
(i) parallelogram efgh--> parallelogram xwvu
(ii) hexagon cdefgh--> hexagon yxwvut
(iii) triangle efg--> triangle vwu

answers options:
1.i only
2.ii and iii only
3.i and iii only
4.i, ii, and iii

When are two distinct non vertical lines parallel

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

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.