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GaryK [48]
3 years ago
8

I need help on solving.

Mathematics
2 answers:
bulgar [2K]3 years ago
6 0

Answer:

x =  - 1 \\  - 2 + 0.4y = 0.4 \\ 0.4y = 0.4 + 2 = 2.4 \\ y = 2.4  \div 0.4 = 6 \\ y = 1 \\ 2x + 0.4 = 0.4 \\ 2x = 0.4 - 0.4 = 0 \\  x = 0

Elena-2011 [213]3 years ago
4 0

Answer:

2x + 0.4y = 0.4 \\ 2( - 1) + 0.4y = 0.4 \\ 0.4 y = 2.4 \\ y =  \frac{2.4}{0.6}  \\  \therefore \: y = 6 \\ 2x + 0.4(1) = 0.4 \\ \therefore \: x = 0

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It is 0.83

Step-by-step explanation:

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If the diameter of a circle is 80 ft., find the area A 5,024 ft2 B 20,096 ft2 C 251.2 ft2 D 125.6 ft2
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Simplify <br>please answer this question and attach a photo of your solution ​
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that is the procedure above

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Let sets A and B be defined as follows.
erica [24]

There are 4 elements in the set A and 8 elements in set B that is n(A) = 4 and n(B) = 8

<h3>Cardinality of a set</h3>

This is the total number of elements in a set. Given the following sets;

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Learn more on cardinality of set here: brainly.com/question/23976339

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6 0
2 years ago
Assume that all​ grade-point averages are to be standardized on a scale between 0 and 4. How many​ grade-point averages must be
guapka [62]

Answer:

a) The required sample size  n= 55011,57025

b) The sample size is not practical, because that size is extremely large and   would be very costly to collect, normally the size have to be significant but no to large to avoid cost unnecessary

Step-by-step explanation:

Range

σ = \frac{4-0}{4} = 1

E = 0,011 \\c= 99 %\\⇒ 0,99

Sample size can be determinate using equation:

n=(\frac{Z_{\alpha /2 * σ} }{E})^{2}

Using confidence level desired 99% Z_{\alpha /2} = 2,58

Table used :

<em>Confidence         Z_{\alpha/2 }</em>

<em>         90 %                    1,60</em>

<em>         95 %                    1,96</em>

<em>        </em><em> 99 %                    2,58</em>

<em>        99,9 %                  3,291</em>

So replacing:

n=(\frac{2,58 * 1 }{0,011})^{2}

n= 234,5454545^{2} \\n=55011,57025

6 0
4 years ago
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