Q2 of 23 Page 1

Attempt any four of the following sub questions:

If the point A (5, 2) lies on the graph of the equation 5x + ay = 19, then find a.

Put (5, 2) in the equation 5x + ay = 19

⇒ 5 × 5 + a × (2) = 19


⇒ 2a = 19 - 25


⇒ 2a = - 6


⇒ a = - 3


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