-20 + 11= Please help if you know what the answer is please show work or explane how you got it?
2 answers:
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Notice* No options are provided, so I will solve the expression.
Answer:
Step-by-step explanation:
Step 1: Simplify
Step 2: Rewriting the whole as an Equivalent Fraction
Subtracting a fraction from a whole
Rewrite the whole as a fraction using 5 as the denominator :
5x = 5x/1 = 5x * 5/5
<em>Equivalent fraction</em> : The fraction thus generated looks different but has the same value as the whole
<em>Common denominator </em>: The equivalent fraction and the other fraction involved in the calculation share the same denominator
Adding fractions that have a common denominator :
dding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
5x • 5 - (4) 25x - 4
-------------- = ---------
5 5
Step 3: Simplify 25/4
Rewriting the whole as an Equivalent Fraction :
Adding a whole to a fraction
Rewrite the whole as a fraction using 4 as the denominator :
29 = 29/1 = 29 * 4/4
Adding fractions that have a common denominator :
Adding up the two equivalent fractions
5 • (25x-4) + 29 • 4 125x + 96
--------------------------- = -----------
4 4
Final result :
125x + 96
—————————
4
___________
Terms and topics:
- Dividing exponents
- Polynomial roots
- Nonlinear equations
- Equations which are reducible to quadratic
- Reducing fractions to lowest terms
Using the t-distribution, it is found that the data does not provide convincing evidence that the mean number is greater when the coupons were addressed to a female.
<h3>What are the hypothesis tested?</h3>At the null hypothesis, it is tested if there is no difference, that is, the mean is of 0, hence:
At the alternative hypothesis, it is tested if the mean number is greater for females, that is, the mean is greater than 0, hence:
The test statistic is given by:
The parameters are:
is the sample mean.
is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
- n is the sample size.
In this problem, the parameters are given as follows:
.
Hence, the test statistic is given by:
t = 2.23
<h3>What is the conclusion?</h3>Considering a <em>right-tailed test</em>, as we are testing if the mean is greater than a value, with a <em>significance level of 0.01 and 50 - 1 = 49 df</em>, the critical value is given by .
Since the test statistic is less than the critical value for the right-tailed test, the data does not provide convincing evidence that the mean number is greater when the coupons were addressed to a female.
More can be learned about the t-distribution at brainly.com/question/26454209