Question

The pairs of equations x+2y-5 = 0 and -4x-8y+20=0 have:
(a)Unique solution
(b)Exactly two solutions
(c)Infinitely many solutions
(d)No solution
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Answer 1

Answer:

(C) Infinitely many solutions

Step-by-step explanation:

a1 / a2 = 1 / -4

b1 / b2 = 2 / -8 = 1 / -4

c1 / c2 = -5 / 20 = -1 / 4

This shows:

a1 / a2 = b1 / b2 = c1 / c2

Therefore, the pair of equations has infinitely many solutions.