Question

Consider the linear system of equations. y = –x + 9 y = 0.5x – 6 If the solution is (a,–1), what is a? a =

Answer 1

Answer is 10

Explanation:

Since the graphe cross only at one point there is only one solution for the equation.

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Answer 2

a = 10

Explanation:

From the solution given, x = a and y = -1

Substitute for x and y in either of the equations

y = -x + 9

-1 = -a + 9

a = 9 + 1 = 10