Ascale model of a butterfly has a width of 12 centimeters and a height of 8 centimeters. if the actual width of the butterfly is 9 centimeters, what is the actual height of the butterfly?

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

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.

Plz ( true - false) all triangles have interior angles whose measure sum to 90.