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Veronika [31]
3 years ago
10

If a system of linear equations consists of two lines that are exactly the same (overlap; produce the same graph), how many solu

tions does the system have?
0

1

2

infinite
Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
3 0

Consider the system of linear equation:

\left\{\begin{array}{l}a_1x+b_1y=c_1\\a_2x+b_2y=c_2\end{array}\right.

This system will have:

  • exactly one solution if \dfrac{a_1}{a_2}\neq \dfrac{b_1}{b_2};
  • no solutions if \dfrac{a_1}{a_2}= \dfrac{b_1}{b_2}\neq \dfrac{c_1}{c_2};
  • infinetely many solutions if \dfrac{a_1}{a_2}= \dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}.

If a system of linear equations consists of two lines that are exactly the same (a_1x+b_1y=c_1), then \dfrac{a_1}{a_1}= \dfrac{b_1}{b_1}=\dfrac{c_1}{c_1}=1 and  the system will have infinitely many solutions.

Answer: correct choice is D.

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Step-by-step explanation:

You can figure this a couple of ways.

I usually find it easiest to figure in terms of the number of cubes each dimension represents. The vertical dimension (3/2 cm) is the length of 3 cubes; the front-back dimension (2 cm) is the length of 4 cubes, and the width (1 cm) is the length of 2 cubes.

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