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babymother [125]
2 years ago
6

Which shows the correct first step to solving the system of equations in the most efficient manner? 3 x + 2 y = 17. x + 4 y = 19

. x = negative 4 y + 19 x = StartFraction negative 2 y + 17 Over 3 EndFraction 4 y = negative x + 19 y = StartFraction negative 3 x + 17 Over 2 EndFraction

Mathematics
2 answers:
asambeis [7]2 years ago
4 0

Answer:

a.)x = negative 4 y + 19

Step-by-step explanation:

i got it right on e2020 lol

skelet666 [1.2K]2 years ago
3 0

Answer: First option.

Step-by-step explanation:

<h3> The missing picture is attached.</h3><h3></h3>

You can use these methods to solve a System of Equations and find the value of the variables:

A. Substitution method.

B. Elimination method.

In this case, given the following System of equations:

\left \{ {{3 x + 2 y = 17} \atop {x + 4 y = 19}} \right.

The most efficient method to solve it is the Substitution Method. The procedure is:

Step 1: Solve for one of the variables from the most convenient equation.

Step 2: Make the substitution into the other equation and solve for the other variable in order to find its value.

Step 3: Substitute the value obtained into the equation from Step 1 and evaluate, in order to find the value of the  other variable.

Based on this, you can identify that first step to solve the given System of equations, is solving for "x" from the second equation:

x + 4 y = 19\\\\x=-4y+19

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MrRa [10]

Answer:

Quotient: 2x^2+x-3

Please see the attachment.

Step-by-step explanation:

Given: (2x^4-3x^3-3x^2+7x-3)\div (x^2-2x+1)

We are given rational expression and need to find quotient.

Using long division method to find the quotient.

First we get rid of 2x^4 by x^2

x^2-2x+1 ) 2x^4-3x^3-3x^2+7x-3 ( 2x^2+x-3

                 -2x^4+4x^3-2x^2

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                                      3x^2-6x+3

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Hence, The quotient of division is 2x^2+x-3

8 0
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adell [148]

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(1):g4 was replaced by g^4.

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A friend of mine is giving a dinner party. His current wine supply includes 10 bottles of zinfandel, 8 of merlot, and 11 of cabe
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Answer:

a) 720, b) 475020, c) 69300, d) 0.146, e) 0.001

Step-by-step explanation:

It is given that my friend has 10 bottles of zinfandel, 8 of merlot, and 11 of cabernet.

a)

If he wants to serve 3 bottles of zinfandel and serving order is important, then the total number of ways is

10\times 9\times 8=720

Therefore if he wants to serve 3 bottles of zinfandel and serving order is important, then the total number of ways are 720.

b)

The total number of bottles is

10+8+11=29

Combination is defined as

^nC_r=\frac{n!}{r!(n-r)!}

where, n is total possible outcomes and r is selected outcomes.

we have to select 6 bottles out of 29. so,

^{29}C_{6}=475020

Therefore ff 6 bottles of wine are to be randomly selected from the 29 for serving, then the total number of ways are 475020.

c)

If we want to select 2 bottles of each variety, then total number of ways are

^{10}C_{2}\times ^{8}C_{2}\times ^{11}C_{2}=69300

Therefore if 6 bottles are randomly selected with two bottles of each variety, then the total possible ways are 69300.

d)

Probability is defined as

P=\frac{\text{Total outcomes}}{\text{Favorable outcomes}}

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Therefore the probability that two bottles of each variety being chosen is 0.146.

e)

If 6 bottles are randomly selected, then the probability that all of them are the same variety is

\frac{^{10}C_{6}+^{8}C_{6}+^{11}C_{6}}{^{29}C_{6}}=\frac{700}{475020}\approx 0.001

Therefore if 6 bottles are randomly selected, then the probability that all of them are the same variety is 0.001.

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