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dimaraw [331]
3 years ago
10

Will mark brainliest plz help!

Mathematics
1 answer:
Elan Coil [88]3 years ago
4 0

Answer:

56

Step-by-step explanation:

hope it helps

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A ray, is a line that has one endpoint on one side and on the other side is an infinity amount of numbers

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Graph a system of equations to solve log (−5.6x + 1.3) = −1 − x. Round to the nearest tenth.
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Step-by-step explanation:

-2.1 and 0.2

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Ken had 5 math quizzes in a month.
Mnenie [13.5K]

Answer:

Choose the top right one.

Step-by-step explanation:

hoped i helped i really hope i helped. can you please please give me crown  as well?

8 0
1 year ago
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A study was designed to investigate the effects of two​ variables, (1) A​ student's level of mathematical anxiety and​ (2) teach
Mashcka [7]

Answer:

P(X>400)=P(\frac{X-\mu}{\sigma}>\frac{400-\mu}{\sigma})=P(Z>\frac{400-440}{20})=P(z>-2)

And we can find this probability using the complement rule:

P(z>-2)=1-P(z

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(z>-2)=1-P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(440,20)  

Where \mu=440 and \sigma=20

We are interested on this probability

P(X>440)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

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

If we apply this formula to our probability we got this:

P(X>400)=P(\frac{X-\mu}{\sigma}>\frac{400-\mu}{\sigma})=P(Z>\frac{400-440}{20})=P(z>-2)

And we can find this probability using the complement rule:

P(z>-2)=1-P(z

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(z>-2)=1-P(z

6 0
3 years ago
Plz help me 2x+y=4 4x+2y=8
aleksklad [387]

Answer: Y= 2 X=1

Step-by-step explanation:

2x+y=4                  4x+2y=8

2x     =/2                     2y= /2

y=2                          4x=4

                               /4= /4

                               X= 1

6 0
3 years ago
Read 2 more answers
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