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Mumz [18]
3 years ago
15

Which of the following is the solution to the system of equations?

Mathematics
1 answer:
drek231 [11]3 years ago
6 0

Answer:

B (3/4,5/4)

Step-by-step explanation:

y = 2- x

\frac{5}{4}  = 2 -  \frac{3}{4}

y = 3x - 1

\frac{5}{4}  = 3 \times  \frac{3}{4}  - 1

\frac{5}{4}  =  \frac{9}{4}  -  \frac{4}{4}

Hope this helps ^-^

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Olegator [25]
The answer is 27. because 9 times 3 =27 and 3 times 9 = 27. so they are both constant of proportionality.
5 0
3 years ago
Please help!!! I will mark best answer!
Kisachek [45]

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D

Step-by-step explanation:

7 0
3 years ago
Suppose on a certain test, fifty students earn a perfect score and fifty students earn a zero. determine the mean grade and stan
kodGreya [7K]

Answer:

Mean=50.

standard deviation=50.

Step-by-step explanation:

Let the perfect score be 100.

The mean(average) of a data is given by: Mean=\frac{sum of data points}{number of data points}

Here the number of data points are 100. out of which 50 attains a value 100,and 50 attains value 0.

so, sum of data points=50×100+50×0=5000.

Mean=\frac{5000}{100}

Mean=50.

"Now the standard deviation of data points are calculated by firstly subtracting mean from every entry and then square the number and take it as new entry and calculate the mean of the new data entry and lastly taking the square root of this new mean".

Here if 50 is subtracted from each entry the new entry will have 50 entries as '50' and 50 entries as '-50'.

next on squaring we will have all the 100 entries as '2500'.

now the mean of these entries is: \frac{2500\times100}{100}

                                                         =2500

taking it's squareroot we have \sqrt{2500}=50

Hence, standard deviation=50.




5 0
3 years ago
Read 2 more answers
Does anyone know how to do this? Help please
MArishka [77]

Answer:

ummmmmmmmmmmmmmmmmmmmmm

Step-by-step explanation:

3 0
3 years ago
17. What unit of time will make the statement true?<br> seconds + seconds x day = seconds ?
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Answer:

seconds could be anything but day was 0 then there would be no seconds, right??? that would basically be true.

Step-by-step explanation:

8 0
3 years ago
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