Emile sold 56 tickets for a school carnival and collected $215.00. Adult
tickets (x) cost $4.50 each and student
tickets (y) cost $3.50 each. Write and
solve a system of equations to determine
how many adult tickets were sold.

What is the equation in point slope form of the line that passes through the point (-1, -3) and has a slope of 4? y-1=4(x-3) or y+3=4(x+1)

What is the solution set of the quadratic inequality x^2-5< or equal to 0

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.