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zloy xaker [14]
2 years ago
13

Help needed thanks it greatly appretiated

Mathematics
2 answers:
Ivan2 years ago
5 0

c is the correct answer of this question

Otrada [13]2 years ago
5 0

\huge \boxed{ \tt option \: c}

<h3>Step-by-step explanation:</h3>

\sf \dfrac{15 x{y}^{2} }{15 {x}^{11} {y}^{15}  }

\\  \\

\to \sf \dfrac{15 x {}^{0} {y}^{0} }{15 {x}^{11 - 1} {y}^{15 - 2}  }

\\  \\

\to \sf \dfrac{15  \times 1 \times 1 }{15 {x}^{11 - 1} {y}^{15 - 2}  }

\\  \\

\to \sf \dfrac{15  \times 1 \times 1 }{15 {x}^{10} {y}^{13}  }

\\  \\

\to \sf \dfrac{ \cancel{15 } \times 1 \times 1 }{ \cancel{15} {x}^{10} {y}^{13}  }

\\  \\

\to \sf \dfrac{ 1 }{  {x}^{10} {y}^{13}  }

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a toy store marks down every toy by 15% in January. How much does a toy cost during January? Use p for the price in December.
satela [25.4K]

A toy cost 0.85p in January.

Step-by-step explanation:

Given,

Mark down in January = 15%

Let,

Price in December = p

Mark down in January = 15% of price in December

Mark down in January = \frac{15}{100}*p

Mark down in January = 0.15p

Price of toy in January = Price in December - Mark down

Price of toy in January = p - 0.15p = 0.85p

A toy cost 0.85p in January.

Keywords: mark down, subtraction

Learn more about subtraction at:

  • brainly.com/question/1993757
  • brainly.com/question/2048256

#LearnwithBrainly

7 0
3 years ago
Find the square of each imaginary number.<br> (Get rid of the i)
Dovator [93]

Answer:

- 32/21 over 5 is

Step-by-step explanation:

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7 0
3 years ago
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What is the answer to 5(6p+5)
AfilCa [17]

Answer:

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Step-by-step explanation:

I hope this helps.

3 0
3 years ago
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of pain relief drug is norm
FrozenT [24]

Answer:

a) P(1

b) P(X

Step-by-step explanation:

1) 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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Part a

Let X the random variable that represent the duration of a safe dosage of pain relief drug, and for this case we know the distribution for X is given by:

X \sim N(1.5,0.8)  

Where \mu=1.5 and \sigma=0.8

We are interested on this probability

P(1

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(1

And we can find this probability on this way:

P(-0.625

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-0.625

3) Part b

We are interested on this probability

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 on this way:

P(z

6 0
3 years ago
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Neporo4naja [7]

Answer:

O.225

Step-by-step explanation:

Two negatives = positive

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