Eduardo and Julio each improved their yards by planting daylilies and shrubs. They bought their
supplies from the same store. Eduardo spent $60 on 2 daylilies and 10 shrubs. Julio spent $68
on 2 daylilies and 12 shrubs. What is the cost of one daylily and the cost of one shrub?

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

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.

Is the number 128.439 a rational number