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BaLLatris [955]
3 years ago
13

Factorise fully x^2+2x

Mathematics
1 answer:
GuDViN [60]3 years ago
5 0
Answer: x(x+2)
Factor out x from the expression
X•(x+2)
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Suppose you flip a coin and spin a spinner that is divided into 8 equal regions. Of the 8 equal regions, 3 are red, 4 are black
kipiarov [429]

Answer:

There is a 1/2 chance of getting tails on the coin and there is 3/8 chance of the spinner landing on red. hope this helps

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IM BEGGING YOU PLEASE HELP I WILL GIVE BRAINLIEST!!!!
tensa zangetsu [6.8K]

Answer: The second answer.

Step-by-step explanation:

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Consider this system of equations:
alexandr1967 [171]
<span>"For which value of k does the system have no real number solutions?"
The answer is 4, because 4+4</span>≠16.
<span>
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5 0
3 years ago
Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below
emmasim [6.3K]

Answer:

Tera had the higher z-score, so she should be offered the job.

Step-by-step explanation:

Z- score:

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem:

Whoever has the higher z-score should get the job.

Brittany:

Scored 88.3, mean 63.1, standard deviation 14. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{88.3 - 63.1}{14}

Z = 1.8

Alissa:

Scored 236.5, mean 219, standard deviation 25. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{236.5 - 219}{25}

Z = 0.7

Tera:

Scored 7.75, mean 6.66, standard deviation 0.5. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{7.75 - 6.66}{0.5}

Z = 2.18

Tera had the higher z-score, so she should be offered the job.

3 0
4 years ago
PLZ HELP!!! Will mark brainliest if answers are correct. I'm being timed I need answer as soon as possible. Also willl give a th
Ket [755]

Answer:

Order Data (least to greatest): 35,40,42,46,47,52

Mean: 43.66

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Could not figure out Mean of Differences sorry!

Step-by-step explanation:

To find the mean you add all of the numbers and divide by the amount.

To find MAD find the sum of the data values, and divide the sum by the number of data values.

5 0
3 years ago
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