1.

Graphically, the pair of equations 7x - y = 5; 21x - 3y = 10 represents two lines which are​

Answer»

Graphically, the pair of equations 7x - y = 5 and 21x - 3y = 10 REPRESENT two lines which are parallel lines.

Explanation:

  • The FIRST equation is 7x - y = 5
  • The second equation is 21x - 3y = 10

  • Multiplying 3 to the first equation, we get
  • 21x - 3y = 15, whose left hand side is SIMILAR to the that of the second equation.

  • The constant part for the equations are different.

  • Thus the lines are parallel to each other.


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