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2 years ago

Can someone pleaseeeee solve these for me I will give brainiest!!!!

Mathematics

1 answer:

Aleksandr [31]2 years ago

8 0

Step-by-step explanation:

Bir abzas qurmaq üçün 5 addımdan keçək. Hər addım üçün bir izah və nümunə var. Nümunə bəndimiz kölə ruhları haqqında, Afrikalı Amerikalıların köləlik dövründə yaratdığı orijinal mahnılarla əlaqəli olacaq. Model paraqrafı fikrini sübut etmək üçün illüstrasiyadan (nümunələr verməklə) istifadə edir.

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Savatey [412]

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2 years ago

A student was given the equation x^2+2x-16=0 to solve by completing the square. The first step that was written is shown below.

AlexFokin [52]

Answer:

$x_{1}=-1+\sqrt{17},\:x_{2}=-1-\sqrt{17}$

Step-by-step explanation:

Quadratic Equation Given:

$x^2+2x-16=0$

$x^2 + 2x=16$

$c=\left( \frac{b}{2} \right)^2$

$x^2 + 2x+1=16+1$

$(x+1)^2=17\\$

$x+1=\pm \sqrt{17} \\$

$x=-1 \pm \sqrt{17} \\$

$x_{1}=-1+\sqrt{17},\:x_{2}=-1-\sqrt{17}$

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3 years ago

Previous studies on sleep tendencies report that, on average, an adult American will sleep for 6 hours each night with a standar

Rasek [7]

Answer:

b) One sample z-test for means

Step-by-step explanation:

Normal Distribution

we have μ₀ (population mean from previous studies)

sample size n = 100

standar deviation of population σ = 0.75

And it was determined from sample, that μ = 5 : so we want to know if, at some significance level that value (which is smaller than population mean ) could help in relation to decide about rejecting hypothesis H₀

We should use a z one tail-test for means (left tail)

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2 years ago

Please help quick:

11Alexandr11 [23.1K]

Answer:

A? A?

Step-by-step explanation:

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2 years ago

If f(x)= -2x²-,find f(0).

IRINA_888 [86]

Answer:

Step-by-step explanation:

f(0) = -2(0)²

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= 0

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3 years ago