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GREYUIT [131]
3 years ago
13

20.57 is 42.5% of what number

Mathematics
1 answer:
tangare [24]3 years ago
6 0
42.5x/100 = 20.57

42.5x = 20.57*100

42.5x = 2057

x = 2057/42.5

x = 48.4
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alexira [117]

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Doesnt Have a matrix its singular I believe, But I can really help on that

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3 years ago
Solve -7x^2+x+9=-6x quadratic formula
myrzilka [38]

Answer:

-7x^2+x+9=-6x

-7x^2+x+9+6x=-6x+6x

-7x^2+7x+9=0

quadratic\: formula

x_{1,\:2}=\frac{-7\pm \sqrt{7^2-4\left(-7\right)\cdot \:9}}{2\left(-7\right)}

\sqrt{-7^{2} -4(-7)\times9} =\sqrt{301}

x_{1,\:2}=\frac{-7\pm \sqrt{301}}{2\left(-7\right)}

\frac{-7+\sqrt{301}}{2\left(-7\right)}

=\frac{-7+\sqrt{301}}{-2\cdot \:7}

=\frac{-7+\sqrt{301}}{-14}

\frac{-7-\sqrt{301}}{2\left(-7\right)}

=\frac{-7-\sqrt{301}}{-2\cdot \:7}

=\frac{-7-\sqrt{301}}{-14}

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OAmalOHopeO

7 0
3 years ago
Find the Pearson correlation coefficient R for the given point round any intermediate calculation to no less than six decimal pl
ElenaW [278]

SOLUTION

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Get the given data values

STEP 2: Write the formula for calculating the coefficient

STEP 3

: Calculate the correlation coefficient

Using the calculator,

Hence, the value of r is 0.791

7 0
1 year ago
Help plz I need asap
miv72 [106K]
Choose the one on the very top.
6 0
2 years ago
Can anyone help me if i dont get my grade up i wont get to go to my vollyball games
Alexxandr [17]

Answer:

x = 30

Step-by-step explanation:

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\frac{3}{5}(30) = 18

\frac{1}{3}(30) = 10

18 + 10 = 28

8 0
3 years ago
Read 2 more answers
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