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Aneli [31]
2 years ago
7

Help meeeeeeeeeeeeeeee eeeee

Mathematics
2 answers:
Sedbober [7]2 years ago
4 0
No, the shape does not show a correct line of symmetry. A line of symmetry divides a figure into two halves that make mirror images of each other; the shape's two halves do not make mirror images. 
goldenfox [79]2 years ago
3 0
No, a line of symmetry should cut the shape or object in half and represent a perfect mirror image.
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What is the answer to y=-2/3+b
Mashcka [7]

Answer:

it is B

Step-by-step explanation:

8 0
2 years ago
The scores on a psychology exam were normally distributed with a mean of 60 and a standard deviation of 10 . A failing grade on
tensa zangetsu [6.8K]

Answer:

The cutoff for a failing score was 40,

Approximately 2.3% of the students failed. ​

Step-by-step explanation:

Given,

Mean, \mu=60

Standard deviation, \sigma=10

Let x represents the cutoff for a failing score,

Thus, according to the question,

\frac{x-\mu}{\sigma}=-2

\frac{x-60}{10}=-2

x-60=-20

x=-20+60

x=40

Thus, the cutoff for a failing score is 40,

∵ P(<-2) = 0.02275 = 2.275 % ≈ 2.3 %

Hence, Approximately 2.3 % of the students failed. ​

7 0
2 years ago
As the number of degrees of freedom for a t distribution increases. True or False
valkas [14]

Answer:

t distribution behaves like standard normal distribution as the number of freedom increases.

Step-by-step explanation:

The question is missing. I will give a general information on t distribution.

t-distribution is used instead of  normal distribution when the <em>sample size is small (usually smaller than 30) </em>or <em>population standard deviation is unknown</em>.

Degrees of freedom is the number of values in a sample that are free to vary. As the number of degrees of freedom for a t-distribution increases, the distribution looks more like normal distribution and follows the same characteristics.

7 0
3 years ago
Tom has a recipe for punch that calls for 1/2 gallon of fruit drink, how much fruit drink will tom need to make 5/2 batches of t
Hunter-Best [27]

Answer:

Tom will need \dfrac{5}{4} gallons of fruit drink.

Step-by-step explanation:

Hint- This question can be solved by unitary method.

Tom has a recipe for punch that calls for \dfrac{1}{2} gallon of fruit drink.

i.e for 1 batch of the punch Tom needs \dfrac{1}{2} gallon of fruit drink.

For \dfrac{5}{2} batch of the punch Tom needs \dfrac{1}{2}\times \dfrac{5}{2}=\dfrac{5}{4} gallons of fruit drink.

Therefore, Tom will need \dfrac{5}{4} gallons of fruit drink.

4 0
3 years ago
Use estimation to check the answer to this story problem.
Lelechka [254]
Here, the answer would be: 765 * 11 = 8415  [ About 8 thousands ]

In short, Your Answer would be Option C) <span>The answer should be about 8,000 yards. The student's answer is not correct.

Hope this helps!</span>
3 0
3 years ago
Read 2 more answers
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