The expression from the given options that is equivalent fraction -7/9 is -14/18.
<h3>What is a fraction?</h3>
Fraction can be described as the expression of numbers, which usually have the numerator and the denominator, and this do contains two integers arranged on each other.
From the given fraction,-7/9 if start o test the options by reducing them int their simplest form we will deduced that option B is correct because if we divide 14 by the factor of 2, and 18 by the factor of 2, then it will give us -7/9 which is a negative value of fraction in the question.
Therefore, option B is correct.
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Check the complete options
A. 14/18
B. -14/18
C.21/27
D.35/45
Answer:
It is letter C! I just learned about this a couple of weeks ago!
Answer:
609
Step-by-step explanation:
Standard deviation =
= $30
Margin of error = E = $2
Confidence level = 90%
Since the distribution is said to be normal, we will use z scores to solve this problem.
The z score for 90% confidence level = z = 1.645
Sample size= n = ?
The formula to calculate the margin of error is:
![E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=z\frac{\sigma}{E}\\\\n=(\frac{z\sigma}{E} )^{2}](https://tex.z-dn.net/?f=E%3Dz%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5C%5Csqrt%7Bn%7D%3Dz%5Cfrac%7B%5Csigma%7D%7BE%7D%5C%5C%5C%5Cn%3D%28%5Cfrac%7Bz%5Csigma%7D%7BE%7D%20%29%5E%7B2%7D)
Using the values in above equation, we get:
![n=(\frac{1.645 \times 30}{2} )^{2}\\\\ n = 608.9](https://tex.z-dn.net/?f=n%3D%28%5Cfrac%7B1.645%20%5Ctimes%2030%7D%7B2%7D%20%29%5E%7B2%7D%5C%5C%5C%5C%20n%20%3D%20608.9)
This means, the minimum number of observations required is 609
Answer:
Yes
Step-by-step explanation:
Rectangle 1 dimensions are 12 feet by 16.5 feet
Rectangle 2 has dimensions of 8 inches by 11
inches.
Checking the scale WITHOUT CONVERTING units
12/8=1.5
16.5/11=1.5
Since both have a factor of 1.5, it means the two rectangles are the same but on different scales. However, in case the scale would not have been the same, we would have concluded otherwise. Therefore, triangle 1 is enlargement of triangle 2. These are similar rectangles with different scales.