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3 years ago

I really Need help solving this problem!

Mathematics

1 answer:

Paraphin [41]3 years ago

8 0

Answer:

Hello,

Answer A : 11.2 ≤ X ≤ 29.2

Step-by-step explanation:

$Z=\dfrac{X-20.2}{4.5} \\\\X=4.5*Z+20.2\\\\For\ Z=-2, \ X=4.5*(-2)+20.2=11.2\\For\ Z=2, \ X=4.5*2+20.2=29.2\\$

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HELP NEEDED!!! WILL GIVE 5 STARS!

Jlenok [28]

270=2b + a
420=2a + 3c (you have to use trial and error for this)

B = 120
A = 30
C = 120

Just to check
270 = (2x120) + 30
420 = (2x30) + (3x120)

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3 years ago

-4x + 11y = 15 x=2y Solve for y and x

Stolb23 [73]

Answer:

to find Y

-4x + 11y = 15

x - 2y = 0

equal= -3x + 9y= 15

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3 years ago

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3 years ago

Read 2 more answers

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noname [10]

Answer:

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Step-by-step explanation:

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2 years ago

If copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a yea

Natasha2012 [34]

Answer:

$P(Atleast\ 1) = 0.9999992$

Step-by-step explanation:

Given

$p = 3\%$ --- rate of hard disk drives failure

$n = 4$ --- number of hard disk drives

See comment for complete question

Required

$P(Atleast\ 1)$

First, calculate the probability that the none of the 4 selected is working;

$P(none) = p^4$

$P(none) = (3\%)^4$

$P(none) = (0.03)^4$

Using the complement rule, the probability that at least 1 is working is:

$P(Atleast\ 1) = 1 - P(none)$

This gives:

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3 years ago