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KiRa [710]
3 years ago
7

Determine which system below will produce infinitely many solutions.

Mathematics
2 answers:
lisabon 2012 [21]3 years ago
8 0

Answer:

The answer is C

3x-y=14\\-9x+3y=-42

Step-by-step explanation:

In order to determine the system, we have to know the condition to produce infinitely solutions. A solution of a system is the coordinate (x,y) which is common between two lines ( in a 2D plane). A system does not have solution when the lines do not intercept each other, that it means, they are parallele. When two lines are coincident in all points, there are infinitely solutions.

I have attached an image that shows different systems of two lines.

So, to find the system, we have to find two equal equation. If we multiply by 3 the third system:

3x-y=14\\-9x+3y=-42\\\\(-3)*(3x-y)=(-3)*14\\(1)*(-9x+3y)=(1)*-42\\\\-9x+3y=-42\\-9x+3y=-42

This system has infinitely solutions.

Travka [436]3 years ago
6 0
3x - y = 14

-9x + 3y = -42...divide by -3
3x - y = 14...same as first equation....means same line...means infinite solutions

answer is : 3rd answer choice
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Answer:

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Step-by-step explanation:

The standard deviation of the distribution of sample means is called the standard error of the means.

It is denoted by: \sigma_{\bar X}

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3 years ago
Which choice is equivalent to the product below?
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The answer should be
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7 0
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Calculate the simple interest on $1500 for 3 years at 20% per annum
svp [43]

Answer:

see explanation below

Step-by-step explanation:

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4 0
2 years ago
Find the discriminant of 3x^2-10x=-2
Oksanka [162]

Answer:

76

Step-by-step explanation:

given a quadratic equation in standard form : ax² + bx + c = 0 : a ≠ 0

then the discriminant is Δ = b² - 4ac

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7 0
3 years ago
Which inequality has a dashed boundary line when graphed? A y>=3/5x+1 B y>= -1/3x+1 C y>3x+1
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Answer: C y>3x+1

Step-by-step explanation:

  • When we graph an  inequality with strictly greater of less than sign ('<' or '>'), then the graph has a dashed boundary line .
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From all the given options , only C contains inequality with '>' sign .

Hence, y>3x+1 is the inequality has a dashed boundary line when graphed.

hence, the correct option is C.

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