1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lawyer [7]
3 years ago
15

An animal shelter has two purebred Labradors among the 81 dogs available for adoption. It is also known that 7/9 of the

Mathematics
1 answer:
insens350 [35]3 years ago
3 0

Answer:

Their are 18 number of purebreds

Step-by-step explanation:

An animal shelter has 2 purebred Labradors among the 81 dogs available for adoption. It is known that 7/9 of the dogs are mongrels .The number of purebreds can be computed below.

The number of purebreds Labrador available for adoption  = 2 purebred

The total number of dogs = 81 dogs

7/9 of the dogs are mongrels. This means 7/9 × 81 = 567/9 = 63

The number of mongrels = 63

The number of purebreds = 81 - 63 = 18

Their are 18 number of purebreds

You might be interested in
What is the anyswer to this quiestion<br> 9 + 10
Makovka662 [10]

Answer:

19

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
In the triangle below, what is the length of MN
Anna71 [15]
20 because ML is congruent to MN
7 0
2 years ago
I need help with all the parts
nadya68 [22]

Answer:

NOT UNDERSTANDING I'LL COME BACK TO HELP U

Step-by-step explanation:

3 0
3 years ago
Note: Please make sure to properly format your answers. All dollar figures in the answers need to include the dollar sign and an
Daniel [21]

Using the normal distribution, the percentages are given as follows:

a) 9.18%.

b) 97.72%.

c) 50%.

d) 4.27%.

e) 0.13%.

f) 59.29%.

g) 2.46%.

h) 50%.

i) 50%.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

For this problem, the mean and the standard deviation are given as follows:

\mu = 247, \sigma = 60

For item a, the proportion is the <u>p-value of Z when Z = 167</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (167 - 247)/60

Z = -1.33.

Z = -1.33 has a p-value of 0.0918.

Hence the percentage is of 9.18%.

For item b, the proportion is the <u>p-value of Z when Z = 367</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (367 - 247)/60

Z = 2.

Z = 2 has a p-value of 0.9772.

Hence the percentage is of 97.72%.

For item c, the proportion is <u>one subtracted by the p-value of Z when X = 247</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (247 - 247)/60

Z = 0

Z = 0 has a p-value of 0.5.

Hence the percentage is of 50%.

For item d, the proportion is <u>one subtracted by the p-value of Z when X = 350</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (350 - 247)/60

Z = 1.72

Z = 1.72 has a p-value of 0.9573.

1 - 0.9573 = 0.0427.

Hence the percentage is of 4.27%.

For item e, the proportion is the <u>p-value of Z when Z = 67</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (67 - 247)/60

Z = -3.

Z = -3 has a p-value of 0.0013.

Hence the percentage is of 0.13%.

For item f, the proportion is the <u>p-value of Z when X = 300 subtracted by the p-value of Z when X = 200</u>, hence:

X = 300:

Z = \frac{X - \mu}{\sigma}

Z = (300 - 247)/60

Z = 0.88.

Z = 0.88 has a p-value of 0.8106.

X = 200:

Z = \frac{X - \mu}{\sigma}

Z = (200 - 247)/60

Z = -0.78.

Z = -0.78 has a p-value of 0.2177.

0.8106 - 0.2177 = 0.5929.

Hence the percentage is 59.29%.

For item g, the proportion is the <u>p-value of Z when X = 400 subtracted by the p-value of Z when X = 360</u>, hence:

X = 400:

Z = \frac{X - \mu}{\sigma}

Z = (400 - 247)/60

Z = 2.55.

Z = 2.55 has a p-value of 0.9946.

X = 360:

Z = \frac{X - \mu}{\sigma}

Z = (360 - 247)/60

Z = 1.88.

Z = 1.88 has a p-value of 0.97.

0.9946 - 0.97 = 0.0246

Hence the percentage is 2.46%.

For items h and i, the distribution is symmetric, hence median = mean and the percentages are of 50%.

More can be learned about the normal distribution at brainly.com/question/24808124

#SPJ1

4 0
1 year ago
Which number line represents the solution set for the inequality <br> 3(8-4x) &lt; 6(x-5) ?
viktelen [127]

Answer:

Second number line(from top to bottom).

Step-by-step explanation:

We are given the following inequality:

3(8 - 4x) < 6(x - 5)

It is solved similarly to an equality, so:

24 - 12x < 6x - 30

-18x < -54

Multiplying by -1, the signal changes from < to >. So

18x > 54

x > \frac{54}{18}

x > 3

Thus the correct answer is given by the second number line.

7 0
3 years ago
Other questions:
  • In a sample of 75 randomly selected students at school, 32 are female. There are 1, 371 students in the school. Using these resu
    8·1 answer
  • Use the values log 48 congruant to 1.68 and log 3 congruant to 0.48 to find the approximate value of log3 48.
    14·1 answer
  • 4/3=-6e-5/3 solve for e
    6·1 answer
  • Circle the prime numbers in the following list :27, 19, 37, 45, 63, 79
    7·1 answer
  • Ivan has just opened a small coffee shop. He paid a copy store 0.10 per copy to make 1428 copies of the flyer to announce the op
    12·1 answer
  • Help help help helphelp h;i
    5·2 answers
  • HELP!
    9·1 answer
  • X+1/5-3(x-1)/10=2 what is x​
    12·1 answer
  • Please help quickly.
    5·2 answers
  • A grocery store has bananas on sale for 2 pounds for $1.50. What is the cost of 6 pounds of bananas?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!