Frank and gertrude mow lawns for extra money over the summer. frank's income is determined by f(x) = 5x + 15, where x is the number of hours. gertrude's income is g(x) = 4x + 20. if frank and gertrude were to combine their efforts, their income would be h(x) = f(x) + g(x). create the new function h(x). if frank works 4 hours and gertrude works 4 hours, and if they each get half of the money when they work together, will frank make more money working alone or by teaming with gertrude?

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.