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faust18 [17]
3 years ago
13

4-d= -(d -4 ) -no solution infinitely many solutions -one solutions -two solutions​

Mathematics
1 answer:
a_sh-v [17]3 years ago
4 0

Answer: infinite solutions

Step-by-step explanation: any value of d makes the equation true. By simplifying the right side, we get -d + 4, which is the same as 4 - d, so we essentially get 4 - d = 4 - d.

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7 0
2 years ago
The table shows the time a patient spends at the dentist and the amount of the bill.
erica [24]

<u>Answer-</u>

Correlation coefficient for the data in the table was found to be 0.93.

<u>Solution-</u>

Taking the independent variable or input variable as, the time a patient spends at the dentist and the dependent variable or output variable as the amount of the bill.

We know that,

r=\frac{n(\sum xy)-\sum x \sum y}{\sqrt{[n\sum x^{2} -({\sum x})^{2}]\times [n\sum y^{2} -({\sum y})^{2}]}}


Calculating the values from the table, then putting it in the formula

r=\frac{4 \times 3130.9 \ - \ 6.45 \times 1473}{\sqrt{[4\times 12.3725 \ - \ 6.45^{2}][4 \times 877475 \ - \ 1473^2]}}

\Rightarrow r=0.929720561 \approx 0.93

∴  Correlation coefficient for the data is 0.93.


3 0
3 years ago
Read 2 more answers
Evaluate the following expression. 1/5^-2 <br> Evaluate 6^-3
Marizza181 [45]
1/5^-2 = 5^2 so this equals

 = 25
7 0
3 years ago
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