bill and ron build towers using blocks. the expression 4b + 2 represents the number of blocks bill uses. the expression 8b – 5 represents the number of blocks ron uses.

complete the expression to represent the total number of blocks bill and ron use.

__ b - __

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.

Answer asap! due in 30 minutes! ! 8th grade math

If the square of a positive integer is added to 2 times the integer the result is 48. find the integer.