Please Help, Math!!
1 answer:
The correct answer is the graph in the bottom left. The one below the first graph.
Testing the origin for
yields
This is true so we shade the lower half plane
of
Testing the origin for
yields
Which is false.
So we shade the upper half plane of
which is the dashed line.
If this are the options:
a . b.
c. d.
Then the graph corresponding to option C is what I am referring to.
Testing the origin for
yields
This is true so we shade the lower half plane
of
Testing the origin for
yields
Which is false.
So we shade the upper half plane of
which is the dashed line.
If this are the options:
a . b.
c. d.
Then the graph corresponding to option C is what I am referring to.
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Answer:
Janice and Karen could do in 1 day:
- <u>20% of the job</u>.
Step-by-step explanation:
To identify how much of the job could janice and caren do in 1 day, first, we must find how much of the job make just 1 person at the same rate:
If three persons make a job in 3 1/3 days, 1 person make the job in x:
- 3 persons ⇒ 3 1/3 days or 10/3 days
- 1 person ⇒ x
Then:
(we cancel the unit "persons")
- x = 10 days
Just a person would need 10 days to complete a job, now, we're gonna divide this value in 2 to obtain the time that need two persons to complete a job:
- Time to complete a job between 2 persons =
- Time to complete a job between 2 persons = 5 days
How two persons need 5 days to complete a job (in this case, the two persons are Janice and Karen), we can make a simple rule of three to obtain the percentage made in 1 day:
- 5 days ⇒ 100% of a job
- 1 day ⇒ x
Then:
(you can use the % if you want, the result is the same)
As you can see, <u><em>Janice and Karen just in a day could do 20% of the job</em></u>.