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Georgia [21]
2 years ago
9

Show division using an area model

Mathematics
1 answer:
wariber [46]2 years ago
7 0
Hey do you have a question you have to read
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It takes Alexandra 2 hours and 44 minutes to cut the grass. Austin needs 3 hours and 14 minutes to cut the grass. If they work t
Vedmedyk [2.9K]
For problems such as this, it can be handy to remember that
.. 1/(1/a +1/b) = ab/(a +b)

The time required to do a job is the inverse of the rate at which the job is done. Rates are added when people work together (in math problems, not in real life).

(2:44)*(3:14)/(2:44 +3:14) = 1:28:52.3

___
2:44 = 41/15 hours = 82/30 hours
3:14 = 97/30 hours
Using the formula above, we have a "working together" time of
.. (82/30)*(97/30)/(82/30 +97/30) = 82*97/(30*179) = 3977/2685 . . . hours
.. = 1 hour 28 156/179 minutes
.. = 1 hour 28 minutes 52 52/179 seconds

___
Learn to use the fraction functions on your calculator. They can be very helpful.
6 0
3 years ago
According Two data from the 2010 United States Census 83.7% of Americans lived in the metropolitan area suppose maria researcher
Murrr4er [49]

Answer:

Mean is 83.7%

And, the standard deviation is 0.033

Step-by-step explanation:

The computation of the mean and the standard deviation is as follows:

Let us assume the P be the sample proportion

Mean is 83.7%

And, the standard deviation is

= \sqrt{\frac{p(1-p)}{n} } \\\\=\sqrt{\frac{0.837(1-0.837)}{125} }

= 0.033

8 0
2 years ago
A = 4 units B= 3 units C= 3.5. D= 5 units
aliya0001 [1]

D would be the correct answer.

Explanation

a^2+b^2=c^2

4^2+3^2=c^2

16+9

25 units

4 0
3 years ago
Find the perimeter of the window to the nearest hundredth.
Natalka [10]
7.71 feet is your answer.
6 0
1 year ago
Help plz
bixtya [17]

Answer:

Triangle 1 has the most area

Step-by-step explanation:

Because triangle has more whole blocks and also sides

hope this helps. if it's wrong im sorry :(

7 0
2 years ago
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