3 years ago

PLEASE HELP!!

Mathematics

2 answers:

Alex_Xolod [135]3 years ago

5 0

The answer is C cuz it is 3,4

ArbitrLikvidat [17]3 years ago

3 0

Answer:

only c is function as it has unique images

others are not function because image ain't unique

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Rút gọn : <br> (x+2)^2+(3-x)^2= ?

Yanka [14]

Step-by-step explanation:

=x^2+2x+4+9-6x+x^2

=2x^2-4x+13

6 0

3 years ago

Construct the confidence interval for the population standard deviation for the given values. Round your answers to one decimal

Alex777 [14]

Answer:

The correct answer is " $2.633< \sigma < 4.480$ ".

Step-by-step explanation:

Given:

n = 21

s = 3.3

c = 0.9

now,

$df = n-1$

$=20$

⇒ $x^2_{\frac{\alpha}{2}, n-1 }$ = $x^2_{\frac{0.9}{2}, 21-1 }$

= $31.410$

⇒ $x^2_{1-\frac{\alpha}{2}, n-1 }$ = $10.851$

hence,

The 90% Confidence interval will be:

= $\sqrt{\frac{(n-1)s^2}{x^2_{\frac{\alpha}{2}, n-1 }} } < \sigma < \sqrt{\frac{(n-1)s^2}{x^2_{1-\frac{\alpha}{2}, n-1 }}$

= $\sqrt{\frac{(21-1)3.3^2}{31.410} } < \sigma < \sqrt{\frac{(21.1)3.3^2}{10.851} }$

= $\sqrt{\frac{20\times 3.3^2}{31.410} } < \sigma < \sqrt{\frac{20\times 3.3^2}{10.851} }$

= $2.633< \sigma < 4.480$

4 0

3 years ago

Please help me asap !!

Andrej [43]

Answer:

obtuse is the anwer

5 0

3 years ago

Read 2 more answers

An=−2+32(n−1)<br><br> What is the 21st term of the sequence?

OLEGan [10]

Answer:

a₂₁ = 638

Step-by-step explanation:

substitute n = 21 into the explicit formula

a₂₁ = - 2 + 32(21 - 1) = - 2 + 32(20) = - 2 + 640 = 638

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2 years ago

Write an equation of the line that passes through (0,-5) and is perpendicular to the line y=4/5x.

Illusion [34]

Answer:

y = -5/4x - 5

Step-by-step explanation:

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3 years ago