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12345 [234]
2 years ago
5

Examine the system of linear equations. –3x y = 2 2x 4y = –20 Which number could be multiplied by the first equation to eliminat

e the y when the equations are added together? -4 4 2 10.
Mathematics
2 answers:
Oksanka [162]2 years ago
8 0

Answer:

The answer is A Or 4

Step-by-step explanation:

EDGE 2022

satela [25.4K]2 years ago
3 0

Answer:

A - -4

Step-by-step

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A recipe for leomnade calls for 1 cups of sugar and 5 cups of water. how much sugar is used per cup of water?
notka56 [123]
If one cup of sugar needs five cups water than divide the cup of water by five to get 1/5 cups sugar per cup of water :)
5 0
3 years ago
Suppose that the mean score on a creativity test is 16 and the standard deviation is 4. You are told that the distribution is no
Savatey [412]

Answer:

P(12

And we can find this probability on this way:

P(-1

We expect around 68.27% between the two scores provided.

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(16,4)  

Where \mu=16 and \sigma=4

We are interested on this probability

P(12

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(12

And we can find this probability on this way:

P(-1

We expect around 68.27% between the two scores provided.

5 0
3 years ago
11) If A = {19, 20, 21, 24} and B = {17, 19, 20, 22), list the elements of A U B.
Elodia [21]

Answer:

A U B = {17, 19, 20, 21, 22, 24}

Step-by-step explanation:

The symbol U is the union symbol, which denotes the union of two sets.

This means that given two sets A and B, the expression

A U B

indicates all the elements that belong to either set A or set B.

In this problem, we have the following two sets:

A = {19, 20, 21, 24}

B = {17, 19, 20, 22}

We can therefore list all the elements belonging to either set A or set B, they are:

17, 19, 20, 21, 22, 24

So, the expression A U B indicates the set:

A U B = {17, 19, 20, 21, 22, 24}

3 0
3 years ago
What is the slope function?
egoroff_w [7]

Answer:

y=mx+b

Step-by-step explanation:

6 0
3 years ago
PLEASEEEEEE HELLLPPPPP!!!!!!!
Marta_Voda [28]
The right answer to that would be A
3 0
3 years ago
Read 2 more answers
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