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Elden [556K]
3 years ago
7

Find the value of ab when a=4/7 and b= 4/11

Mathematics
2 answers:
Hoochie [10]3 years ago
8 0

Answer:

16/77

Step-by-step explanation:

<em>When two numbers are close togtether, you want to multiply them.  Since it is ab, you multiply a and b.  </em>

<u>a= 4/7</u>

<u>b= 4/11 </u>

<u>so, 4/7 times 4/11</u>

<em>When you multiply fractions, you multiply the numerators (the top number of a fraction) of the fractions together.  You also multiply the denominators(the bottom number) of the fractions together.</em>

So, let's multiply the numerators first.

<u>4 times 4 equals 16, so that is the new numerator</u>

<u>7 times 11 is 77, so that is the new denominator</u>

Let's combine it into a fraction.  Numerator/denominator= 16/77

<em>Sometimes, you will need to reduce.  Reducing meaning that you divide the fraction by a number so it can't be reduced/divided anymore.  Until a fraction is at it's simplest form.  </em>

<u>Example</u>: 2/4 reduces to 1/2 because both the numerator, 2, and the denominator, 4, can be reduced by 2.  As you can see, 1/2 is at it's simplest form and cannot be reduced any further.

Dafna11 [192]3 years ago
5 0

Answer: 16/77

Step-by-step explanation: Here we're asked to evaluate ab

given that <em>a = 4/7</em> and <em>b = 4/11</em>.

So we start by plugging in our given

values for <em>a</em> and <em>b</em> into the problem.

If we do this, ab would then be (4/7)(4/11).

When multiplying two fractions together, we multiply across

the numerator and we also multiply across the denominators.

So (4/7)(4/11) is 16/77 which is our final answer.

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At Ken's boutique, 33 customers wore a size small, and 51 customers wore a different size.
Temka [501]

Answer:

11/28

Step-by-step explanation:

1. Add up all of the customers to get the sample size.

    33 + 51 = 84

2. Since we are finding the chance of it being a size small, 33 will be out numerator.

3. Create the final fraction, (33/84)

4. Simplify (11/28)

<em>Hope this helps! Comment if you have any questions. :)</em>

4 0
3 years ago
Read 2 more answers
5 fractions that are near but not equivalent to 2/3
Montano1993 [528]
Five fractions that are near to the fraction two-thirds but not equivalent or 1/2 1/4 3/6 5/9 15/21.

Hope this helps!!!!
5 0
3 years ago
A charity receives 2025 contributions. Contributions are assumed to be mutually independent and identically distributed with mea
uysha [10]

Answer:

The 90th percentile for the distribution of the total contributions is $6,342,525.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For sums of size n, the mean is \mu*n and the standard deviation is s = \sqrt{n}*\sigma

In this question:

n = 2025, \mu = 3125*2025 = 6328125, \sigma = \sqrt{2025}*250 = 11250

The 90th percentile for the distribution of the total contributions

This is X when Z has a pvalue of 0.9. So it is X when Z = 1.28. Then

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

By the Central Limit Theorem

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

1.28 = \frac{X - 6328125}{11250}

X - 6328125 = 1.28*11250

X = 6342525

The 90th percentile for the distribution of the total contributions is $6,342,525.

3 0
3 years ago
Please help I'm giving 50 points I don't have time to do assignment as of now so can someone do me the favor of doing it?
Zolol [24]

Answer:

Step-by-step explanation:

1. Not a function

2. Function

3. Function

4. Not a function

5. Not a function

6. Function

7. Function

8. Not a Function

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10. Not a Function

7 0
2 years ago
Read 2 more answers
6.
Degger [83]
Answer: True

---------------------------------

Work Shown:

Follow PEMDAS in reverse to solve for q
22q - 7 < 37
22q - 7+7 < 37+7 ... add 7 to both sides
22q < 44
22q/22 < 44/22 ... divide both sides by 22
q < 2
7 0
3 years ago
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