Eric and mark were at a ball game and visited the concession stand. they each got a hamburger, and mark got lemonade and some cotton candy. eric had a coupon for $2 off the cost. mark paid the rest, which came to $14.50. cotton candy costs $5, and a hamburger costs $4. how much is lemonade? (1 point)
7.5 1.5 4 $3.50***

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

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.