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11Alexandr11 [23.1K]
3 years ago
6

Solve the system of equations 5x + 2 y equals 12 5 x - 2 y equals 28

Mathematics
1 answer:
lawyer [7]3 years ago
8 0
5x+2y=12                       5x+2y=12
5x-2y=28                        5(4)+2y=12
                                        2y=12-20
10x=40                              2y=-8
x=40/10                               y=-8/2
x=4                                      y=-4
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There are 5 pens in a container on your desk. Among them, 3 will write well but 2 have defective ink cartridges. You will select
Norma-Jean [14]

Answer:

Kindly check explanation

Step-by-step explanation:

Total Number of pens = 5

Number of defective pens = 2

Number of non-defective pens = 3

A.) number of defective pens selected :

X : {0, 1, 2}

It is possible that no defective pen will be selected ; 1 defective will be chosen or both pens are defective.

2.)

Defective as Success (since selecting a defective pen is the point of interest.

3.)

Since selection is done without replacement

Probability of success per selection is different for each selection ;

Number of defective = 2

Number of observations = 5

P(success on first selection) = 2/5

P(success on second selection) = 1/4

Hence, X is not well approximated by a binomial random variable.

4.) if selection is done with replacement ; then then the probability of success per selection will be the Same for each selection made. Hence, X will be well approximated by a binomial Random variable.

5.) If sampling is done without replacement, then the the hypergeometric function will be a more effective approximation.

7 0
3 years ago
What is the volume of a cube whose edges each have a measure of 1.5 cm?
inysia [295]
Using the cube formula for volume I got V=3.38cm^3
7 0
3 years ago
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Steve bought a triangular mat to cover a corner of his room. How much area of the floor will this mat cover?
Alecsey [184]

Answer:

i believe is c

Step-by-step explanation:

because you addd 10 plus 8 times 6.

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3 years ago
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Can somebody explain step by step ?
lukranit [14]

Answer:

3m\sqrt[5]{2m^4p^4}

Step-by-step explanation:

We want to find the fifth root of 486m^9p^4. In order to do so, we need to factorise

Let's factorise 486 first:

486 = 2 * 243 = 2 * 3^5

Ah, we see that 3^5 can be taken out and becomes 3 outside of the 5th root since the 5th root of

Now look at the variables. We see that since we have p^"4", whose exponent is less than 5, it's impossible for us to write it as a power of 5, so we leave this in the root.

We also have m^"9", which can be written as m^"5" * m^"4". Again, we see that the m^"4" term will have to remain inside the root, but we can take out the m^"5", which becomes m.

Our final answer is thus: 3m\sqrt[5]{2m^4p^4}.

<em>~ an aesthetics lover</em>

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adoni [48]
One week= 7 days
25-18=7
I believe both vacations are the same amount of time
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