Sherlyn paid for loaches and tetras. What is an algebraic expression that represents the total cost of the fish?

Jim makes $10.35 per hour. write an equation that jim can use to calculate his pay.

Can someone me i’m confused. will give brainliest and a whole bunch of points

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.