SOLUTION: If the point (a, -1) is on the graph of x + 9y^2 = 25, what is the value of a?

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Question 346280: If the point (a, -1) is on the graph of x + 9y^2 = 25, what is the value of a?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Replace x with a and y with -1 and then solve equation for a.

x + 9y^2 = 25

a + 9(-1)^2 = 25

a + 9(1) = 25

a + 9 = 25

a = 25 - 9

a = 16

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