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3 years ago

Which equation shows the quadratic formula used correctly to solve 7x^2=9+x for x?

2 answers:

8 0

The quadratic formula that can be used to correctly solve 7x^2 = 9 + x for 'x' is:
$x = \frac{1 + \sqrt{253}}{14}$
OR
x ≈ 1.20756955, -1.06471240

WITCHER [35]3 years ago

6 0

Hello! Thank you for your question! I would be happy to help!

So here is what you would get if you use the quadratic formula:

x = 1 +- √253 / 14

x ≈ 1.20756955, -1.06471240

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miss Akunina [59]

Answer:

Sample size minimum is 60

Step-by-step explanation:

given that you want to create a 99% confidence interval with a margin of error of .5.

The population standard deviation is equal to 1.5

i.e. $\sigma = 0.5$

Confidence level = 99%

Since population std deviation is known, we can use Z critical value for finding margin of error

Z critical value for 99% = 2.58

Margin of error = $2.58*\frac{1.5}{\sqrt{n} }$

Equate this to 0.5 and solve for n

$2.58*\frac{1.5}{\sqrt{n} }=0.5\\\sqrt{n} =7.74\\n =59.90\\n=60$

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3 years ago

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3 years ago

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belka [17]

Answer:

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<h2>a traepoizd </h2>

Step-by-step explanation:

reason ----

1 parallelogram 

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opposite angle

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3 traepoizd 

one pair of congruent sides that were not parallel. It also had one pair of parallel lines.

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4 0

2 years ago

Read 2 more answers

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Marta_Voda [28]

Answer:

70 routes are possible

Step-by-step explanation:

Here, we want to find the number of possible routes

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3 years ago

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Stells [14]

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4 years ago