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3 years ago

10

the coefficient of correlation between x and y is 0.28 there covariance is 7.6 if the variance of x is 9 then standard division

of y is?

1 answer:

Reptile [31]3 years ago

6 0

Answer: 9.05

the answer is in here: https://brainly.in/question/13877695

Step-by-step explanation:

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Claudio needs to simplify the expression below.<br><br> 3.5x2+9(7.1+0.5)+4

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It would be 79.4, if you follow complete it in the correct order. (mathematically)

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Solve for the variable r

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see explanation

Step-by-step explanation:

Given

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What is 4901 and 75 estimated to

yarga [219]

Answer:

5000 and 100

Step-by-step explanation:

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John had $50 to spend at the mall. He purchased a shirt for $17.50, a pair of pants for $24.99, and a belt for $6.99. John used

Natasha2012 [34]

Answer:

John has 2 dollars and 46 cents left after his purchases.

Step-by-step explanation:

50 - 17.50 = 32.50

32.50 - 24.99 = 7.51

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0.52 + 5.00 = 5.52

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3 years ago

Find the x-intercept for y = 3x^2 + 6x − 10

azamat

Answer:

x-intercepts: (-3.08, 0) and (1.08, 0)

Step-by-step explanation:

Given:

The function is given as:

$y=3x^2+6x-10$

In order to find the x-intercept, we need to equate the given function to 0 as x-intercept is the point where the 'y' value is 0. So,

$y=0\\3x^2+6x-10=0$

Now, this is a quadratic equation of the form $ax^2+bx+c=0$

We find the solution using the quadratic formula,

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here, $a=3,b=6,c=-10$

Now, the solutions are:

$x=\frac{-6\pm \sqrt{6^2-4(3)(-10)}}{2(3)}\\\\x=\frac{-6\pm \sqrt{36+120}}{6}\\\\x=\frac{-6\pm \sqrt{156}}{6}\\\\x=\frac{-6}{6}-\frac{2\sqrt{39}}{6}\ or\ x=\frac{-6}{6}+\frac{2\sqrt{39}}{6}\\\\x=-1-2.08\ or\ x=-1+2.08\\\\x=-3.08\ or\ x=1.08$

Therefore, the x-intercepts are (-3.08, 0) and (1.08, 0)

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3 years ago