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nika2105 [10]
3 years ago
10

NEED ASAP PLEASE

Mathematics
3 answers:
Vesna [10]3 years ago
7 1

Answer:

116.15

Step-by-step explanation:

1.95 - 30.00 - 7.20 - 38.50 = 38.50

77.65 = 38.50

x = $116.15

liberstina [14]3 years ago
4 1

Answer:

x - [1.95 + 30 + 7.20 + \frac{2}{3}{x - (1.95 + 30 + 7.20)}] = 38.5

Step-by-step explanation:

Let the total amount of money Liza has = $x.

Then, According to the question we get equation,

x - [1.95 + 30 + 7.20 + \frac{2}{3}{x - (1.95 + 30 + 7.20)}] = 38.5

⇒ x - [39.15 + \frac{2}{3}{x - 39.15}] = 38.5

⇒ x - 39.15 - \frac{2}{3}{x - 39.15} = 38.5

⇒ x - 39.15 = 3 × 38.5

⇒ x - 39.15 = 115.5

⇒ x = 154.65

Thus, she earned $154.65 by taking care of her neighbor's pet.

xxbtn2 years ago
0 0

1/3(m-1.95-30.0-7.20)=38.50
final answer:154.65

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Answer:

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And we can find this probability with this difference:

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Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(21.1,5.3)  

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P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability using the normal standard table or excel:

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And we can find this probability with this difference:

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P(X>26)=P(\frac{X-\mu}{\sigma}>\frac{26-\mu}{\sigma})=P(Z>\frac{26-21.1}{5.3})=P(z>0.925)

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