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WARRIOR [948]
3 years ago
9

Please I really need your help??!!!

Mathematics
1 answer:
postnew [5]3 years ago
4 0
-12x+7y+8z
Multiply the number
-84y+8z
Factor 4 from Expression
-4(21y-2z)
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Please help me figure this out! Thank you so much :( i really need it! ❤️
Hoochie [10]

Answer:

  \textbf{A. }x=2i\text{ or }x=-2i\\\\\textbf{B. }(x+2i)(x-2i)

Step-by-step explanation:

The quadratic can be solved in a straightforward way:

  x^2+4=0\\\\x^2=-4\qquad\text{subtract 4}\\\\x=\pm\sqrt{-4}\qquad\text{take the square root}\\\\x=\pm2i\qquad\text{simplify}

This tells you that the solutions are ...

  2i or -2i

__

For each root of "a", (x -a) is a factor. Thus the factors of the equation are ...

  (x +2i)(x -2i)

8 0
3 years ago
Fifteen cards numbered 1-15 are placed in a hat. What is the probability that the card has a multiple of 3 on it, given that the
Ivan
1-15 has only 1,3,5,7,9,11,13,15 as odd number therefore a total of 8 odd numbers within 1-15 so that would be 8/15 probability of it being an odd number (I’m not too sure of this sorry)
4 0
3 years ago
PLEASE PLEASE PLEASE HELP ME!!!!!!!!!!!!!
k0ka [10]

Answer:

c

Step-by-step explanation:

the graph has a y intercept of (0, -4) and a slope of 3

the equation is y = 3x - 4

4 0
3 years ago
The collection of all possible outcomes of a random phenomenon is called A. the sample space. B. the distribution. C. the probab
Hoochie [10]

Answer:

Option A is correct.

Sample space is the collection of all possible outcomes of a random phenomenon.

Step-by-step explanation:

- Sample Space

The sample space of a phenomenon is the set of all possible outcomes for that phenomenon.

- Distribution

The distribution of a statistical data set is defined as a listing or function showing all the possible values (or intervals) of the data and how often they occur.

- Probability

Probability describes how likely something is to happen. Probability values are usually between 0 and 1; with 0 denoting impossibility and 1 denoting total certainty.

- Census

Census is an official count or survey of a population

8 0
3 years ago
In your own words, explain what a rational expression is and give and example of one.
patriot [66]

Answer:

A rational expression is when the numerator and the denominator are polynomials. An example is  5/x − 2

8 0
3 years ago
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