All categories

3 years ago

Plz help my daughter she can't figure it out plz help her

Mathematics

1 answer:

Dafna11 [192]3 years ago

6 0

Answer: 3

Step-by-step explanation: First, we have the fraction 1/3.

Next, the word "of" tells us that we need to multiply.

Lastly, we have 9.

So we will multiply 1/3 x 9.

Whenever you have a fraction without a denominator, it means the exact same thing as putting that fraction over 1.

So 9 is the same thing as 9/1.

So we have 1/3 x 9/1.

When multiplying 2 fractions together, we multiply across the numerators and we also multiply across the denominators.

So 1/3 x 9/1 is 9/3 is 9/3.

Notice however that 9/2 is not in lowest terms so we divide the numerator and denominator by 3 to get the

equivalent fraction 3/1 or just 3.

So 1/3 of 9 is 3.

You might be interested in

Find the value of x. I need help thank you! :)

kondor19780726 [428]

Answer:

Step-by-step explanation:

Hope this helps. Let me know if you have any questions.

8 0

3 years ago

Help me answer this question about congruent triangles. 50 points available.

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

No these triangles are not congruent.

<u>Left triangle</u>

Shortest side = 6 cm

Longest side = 13 cm

3rd side = unknown but < 13

<u>Right triangle</u>

Shortest side = 6 cm

Longest side = unknown but > 13

3rd side = 13 cm

Although the shortest side of both triangles is 6 cm, the longest side of the left triangle is 13 cm, whereas the longest side of the right triangle is unknown but will be more than 13 cm.

We do not know if any of the angles are congruent. If they were congruent, we would expect to see this marked by the same angle line(s) on each triangle.

3 0

2 years ago

Jorge wants to be more generous and share his money with people in need. He decided that the first $10 he makes, he will give to

zalisa [80]

Answer:

it will be 634.24 because if you add 551.02 and 93.22 that will be 644.24 then you minus the 10 at the beginning.

7 0

3 years ago

Find the measure of each exterior angle of a regular polygon in which the sum of the measures of the interior angles is 2,520 de

goldenfox [79]

Answer:

0 y+o+u+t+u+b+e

Step-by-step explanation:

7 0

3 years ago

A pathologist knows that 14.9% of all deaths are attributable to myocardial infarctions (a type of heart disease). (Either you h

garik1379 [7]

Answer:

a) The mean number is 745 and the standard deviation is 25.18.

b) 896 deaths is a significantly high number, which means that there is cause for concern.

Step-by-step explanation:

For each death, there are only two possible outcomes. Either it is attributable to myocardial infarctions, or it is not. The probability of a death being attributable to myocardial infarctions is independent of other deaths. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

A value X is significantly high is:

$X > E(X) + 2\sqrt{V(X)}$

In this problem:

$p = 0.149, n = 5000$

a. Find the mean and standard deviation for the number of such deaths that will occur in typical region with 5000 deaths.

$E(X) = np = 5000*0.149 = 745$

$\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{5000*0.149*0.851} = 25.18$

The mean number is 745 and the standard deviation is 25.18.

b. In one region, 5000 death certificates are examined, and it is found that 896 deaths were attributable to myocardial infarction. Is there cause for concern? Why or why not?

Is 896 a significantly high number?

$E(X) + 2\sqrt{V(X)} = 745 + 2*25.18 = 795.36$

895 > 795.36

896 deaths is a significantly high number, which means that there is cause for concern.

6 0

3 years ago