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Marat540 [252]
3 years ago
5

Give two systems of equations that would be easier to solve by substitution than by elimination. Then give two systems that woul

d be easier to solve with elimination. Finally, explain how you decide whether to use elimination or substitution to solve a system.
Mathematics
1 answer:
Daniel [21]3 years ago
5 0
These techniques for elimination are preferred for 3rd order systems and higher. They use "Row-Reduction" techniques/pivoting and many subtle math tricks to reduce a matrix to either a solvable form or perhaps provide an inverse of a matrix (A-1)of linear equation AX=b. Solving systems of linear equations (n>2) by elimination is a topic unto itself and is the preferred method. As the system of equations increases, the "condition" of a matrix becomes extremely important. Some of this may sound completely alien to you. Don't worry about these topics until Linear Algebra when systems of linear equations (Rank 'n') become larger than 2.
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A group of 8 people are sharing gummy bears each person wants 5 gummy bears each bag has 9 gummy bears
ANEK [815]

At least 5 bags of gummy bear bags are needed for each person to get 5 gummy bears.

The given parameters;

  • <em>total number of people sharing the gummy bears, n = 8 people</em>
  • <em>number of gummy bears in each bag, = 9 gummy bears</em>
  • <em>number of gummy bears needed by each person = 5 gummy bears</em>

<em />

The number of gummy bear bags needed to share 5 gummy bears to each person is calculated as follows;

<em>let the number of gummy bears bag = x</em>

\frac{9x}{8} = 5\\\\9x = 40\\\\x = \frac{40}{9} \\\\x = 4.4

Thus, at least 5 bags of gummy bear bags are needed for each person to get 5 gummy bears.

Learn more about sharing and divisions here: brainly.com/question/112003

5 0
3 years ago
Please help if someone could explain this I would be happy to give u brainlest
DerKrebs [107]

Answer:

q = -3

Step-by-step explanation:

Slope -4/1, which means its going down 4, over 1 each time. (Inferred 1 since not told). Going one left of -2 is -3, since the -2 is the final image.

6 0
3 years ago
Is the cordinates (2,4) (5,0) (6,8) (9,2) (11,6) functional?
Dmitrij [34]

Yes this is a function

The reason why is because the x coordinates do not repeat. Each x value maps to exactly one y value. For any input, there is exactly one output. If you were to graph all of these points, then the graph would pass the vertical line test.

If we had something like (2,4) and (2,0) then the input x = 2 would lead to multiple outputs (y = 4, y = 0) which would not make it a function; however we don't have any repeated x values here.

6 0
3 years ago
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What is the value of x?<br> 799<br> A. 36°<br> B. 14°<br> C. 1440<br> D. 56
Alborosie
Option A because the whole triangle equals 180 degrees so as long as your option plus the numbers in the triangle equal 180° you will get it right
8 0
3 years ago
Four math classes recorded and displayed student heights to the nearest inch in histograms. Which histogram can be described as
kari74 [83]

the answer is d (or the last graph)

3 0
3 years ago
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