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N76 [4]
3 years ago
7

An equation is always written to solve for the __________ variable.

Mathematics
1 answer:
Ganezh [65]3 years ago
6 0

Answer:

unknown

Step-by-step explanation:

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Find the sample size necessary in order to be 95% confident when determining the true mean weight within 2 units (EC2). Assume t
bogdanovich [222]

Answer:

(c) 43.

Step-by-step explanation:

Given:

Margin of error (E) = 2

Sample variance (s^{2}) = 44

Confidence level = 95%

The z- value at 95% confidence level is 1.96.

The sample using the provided information can be calculated as:

n=(\frac{z(s)}{E})^{2} \\n=\frac{z^{2} s^{2} }{E^{2} } \\n=\frac{1.96^{2} (44) }{2^{2} }\\n= 42.52\\n=43

Hence, the correct option is (c) 43.

8 0
3 years ago
Triangle MNO is rotated 180Degrees using the origin as the center of rotation. On a coordinate plane, triangle M N O has points
avanturin [10]

Answer:

A. a reflection over the x-axis and then a reflection over the y-axis  

and

B. a reflection over the y-axis and then a reflection over the x-axis

Step-by-step explanation:

3 0
3 years ago
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Please help me with this
ladessa [460]

Answer:

A) There would be less food.

Step-by-step explanation:

4 0
3 years ago
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Veronica's mom left 3/4 of a cake on the table. Her brothers ate 1/2 of it. What fraction of the cake did they eat?
Brums [2.3K]

Answer: 3/8

Step-by-step explanation: Multiply 3/4 and 1/2, or  \frac{3}{4} *\frac{1}{2} \\, which equals 3/8

7 0
3 years ago
Use addition to show how to find 16-9
Daniel [21]
It would be 9 + x =16 
To solve it, subtract 9 from both sides of the equal sign
So (9+x)-9=16-9
Which is x=7, so the answer is 7.
4 0
3 years ago
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