Question

solve the system of linear equations by graphing. round the solution to the nearest tenth as needed. y 2.3 = 0.45x –2y = 4.2x – 7.8 (2.4, –1.2) (–1, 2.5) no solution infinitely many solutions

Answer 1

Unfortunately, I can't do it on a graph here, but I will do it algebraically.
The solution on the graph will be the point of intersection of the two lines representing the equations.
y + 2.3 = 0.45x . . . . . (1)
-2y = 4.2x - 7.8 . . . . . (2)
From (2), y = 3.9 - 2.1x
substituting for y in (1), we have:
3.9 - 2.1x + 2.3 = 0.45x
2.55x = 6.2
x = 6.2/2.55 = 2.4
y = 3.9 - 2.1(2.4) = 3.9 - 5.04 = -1.2
Therefore, solution is (2.4, -1.2)

Answer 2

Answer:

A. (2.4,-1.2)

Step-by-step explanation:

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