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Natali [406]
4 years ago
13

Write the interval as an inequality [-5,5]

Mathematics
1 answer:
Vinvika [58]4 years ago
4 0

Answer:

-5\leq x\leq 5

Step-by-step explanation:

-5<x<5

both of the < need lines under them

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PLS HELP ASAP I SUCK AT THIS PLSS
Ilia_Sergeevich [38]

Answer:

60

Step-by-step explanation:

60*0.45=27

5 0
3 years ago
Evaluate 8.5s + 7.7t when s = 6 and t = 9.
Anna [14]

Answer:

120.3

Step-by-step explanation:

51 + 69.3 = 120.3

8 0
3 years ago
Mathematical Statistics with Applications Homework Help
photoshop1234 [79]

7.37:

a. <em>W</em> follows a chi-squared distribution with 5 degrees of freedom. See theorem 7.2 from the same chapter, which says

\displaystyle \sum_{i=1}^n\left(\frac{Y_i-\mu}{\sigma}\right)^2

is chi-squared distributed with <em>n</em> d.f.. Here we have \mu=0 and \sigma=1.

b. <em>U</em> follows a chi-squared distribution with 4 degrees of freedom. See theorem 7.3:

\displaystyle \frac1{\sigma^2}\sum_{i=1}^n (Y_i-\overline Y)^2

is chi-squared distributed with <em>n</em> - 1 d.f..

c. <em>Y₆</em>² is chi-square distributed for the same reason as <em>W</em>, but with d.f. = 1. The sum of chi-squared distributed random variables is itself chi-squared distributed, with d.f. equal to the sum of the individual random variables' d.f.s. Then <em>U</em> + <em>Y₆</em>² is chi-squared distributed with 5 + 1 = 6 degrees of freedom.

7.38:

a. Notice that

\dfrac{\sqrt 5 Y_6}{\sqrt W} = \dfrac{Y_6}{\sqrt{\frac W5}}

and see definition 7.2 for the <em>t</em> distribution. Since <em>Y₆</em> is normally distributed with mean 0 and s.d. 1, it follows that this random variable is <em>t</em> distributed with 5 degrees of freedom.

b. Similar manipulation gives

\dfrac{2Y_6}{\sqrt U} = \dfrac{\sqrt4 Y_6}{\sqrt U} = \dfrac{Y_6}{\sqrt{\frac U4}}

so this r.v. is <em>t</em> distributed with 4 degrees of freedom.

4 0
3 years ago
-10-5y=-7y solve for y
scoray [572]
-10=-2y By adding 5y to Both sides of the equation

Divide both sides by -2.

-10 divided by -2 equals positive five. A negative divided by a negative equals a positive.

5=y
4 0
4 years ago
Solve ASAP plz there's the screenshot​
alex41 [277]

Answer:he would have to pay with three 20 dollar bills

Step-by-step explanation:

pizza = $10

sub = $5

soda = $1

                              3 x 10 = $30

                              4 x 5 = $20                                 $30 + $20 = $50

                          8 x 1 = 8                          $50 + $8 = $58

sale tax = 7.5

                                          58 + 7.5 =  65.5

7 0
3 years ago
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