Jamal and Cleo mow lawns together. Jamal can mow an average lawn in 60 minutes by
himself. Cleo would take 90 minutes for the same job. How long would It take both of
them together to mow one (1) lawn.
Let :c equal the amount of time in minutes for them to do the job together.
1
Jamal's rate of completion by himself =
of the job every minute.
60
1- Cleo's rate of completion -
of the job every minute.
2
MIC
to do his part
the
60
In the minutes to do the whole lawn: Jamal spent
60
lawn.
2- Cleo spent
to do her part of the lawn.
3- Their parts together equal the 1 lawn, so
+
M = 1.
60
4- Solve the equation to find the time of completion working together.

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.