The rounding rule for a confidence interval for a proportion is to round off to three decimal places.

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

7 0

B.false
Because the number needs to be 5 or up

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2k=ak+7<br> Solve for k<br> Show your work

sertanlavr [38]

Answer:

k=a+7

Step-by-step explanation:

Take 1 k away from both sides. I hope you found this useful!

3 0

3 years ago

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Find the derivative of f(x) = -2x2 + 11x at x = 9.

zavuch27 [327]

$\bf f(x)=-2x^2+11x\qquad\qquad \lim\limits_{h\to 0}\ \cfrac{f(x+h)-f(x)}{h}\\\\
-----------------------------\\\\
\cfrac{[-2(\underline{x+h})^2+11(\underline{x+h})]\quad -\quad [-2x^2+11x]}{h}
\\\\\\
\cfrac{[-2(x^2+2xh+h^2)+11x+11h]\quad -\quad [-2x^2+11x]}{h}
\\\\\\
\cfrac{\underline{-2x^2}-4xh-2h^2\underline{+11x}+11h\quad \underline{+2x^2}\underline{-11x}}{h}$

$\bf \cfrac{-4xh-2h^2+11h}{h}\implies \cfrac{\underline{h}(-4x-2h+11)}{\underline{h}}
\\\\\\
\lim\limits_{h\to 0}\ -4x-2h+11\implies -4x-2(0)+11
\\\\\\
\left. -4x+11\cfrac{}{} \right|_{x=9}\implies -4(9)+11$

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4 years ago

Simplify the expression above

irinina [24]

Answer:

3x^2 + 2x - 3y - 10

Step-by-step explanation:

7y + 2x - 10y +3x^2 - 10x

I like to put it in order starting with exponents like this

3x^2 + 2x - 10x + 7y - 10y

then combine like terms

3x^2 - 8x - 3y

that is as simplified as it gets.

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3 years ago

Rabiyas mother is tired so rabia decided iron her clothes but the ironing cloth herself but the ironing board is too high for he

xeze [42]

This is a guess, but, from what I've researched, maybe decrease? I've looked into it alot and that's just I think, though, it may depend on the previous height. Still, just an educated guess (I've got 100% on all kinds of quizzes because of educated guesses so, it may work!)

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3 years ago

Which is a zero of the quadratic function f(x) = 9x2 - 54x – 19?<br> x= 1/3 <br> x=3 1/3

anygoal [31]

Answer:

x =1/3

Step-by-step explanation:

the zero quadratic function is x=1/3

5 0

3 years ago