EDGE Math 8

Solve each system of linear equations using any of the methods that you learned. Choose your answer.

1.	${\begin{array}{l} 0.2 x + 0.3 y = - 0.1 \\ - 0.5 x + 0.9 y = - 1.07 \end{array}$

(−0.7, −0.8)

(−0.5, 0)

(0.6, −0.2)

no solution

infinitely many solutions

none of the choices

Answer: none of the choices; (0.7, −0.8)

2.	${\begin{array}{l} 10 x + 4 y = 13 \\ \frac{x}{2} - \frac{y}{3} = - \frac{1}{60} \end{array}$

(\frac{4}{5}, \frac{5}{4})

(\frac{5}{4}, \frac{4}{5})

(\frac{3}{5}, \frac{5}{2})

no solution

infinitely many solutions

none of the choices

Answer: $(\frac{4}{5}, \frac{5}{4})$

3.	${\begin{array}{l} 3 x + 2 y = 2 \\ 5 x + 4 y = \frac{11}{3} \end{array}$

(\frac{1}{3}, \frac{1}{2})

(0, 1)

(\frac{2}{3}, 0)

no solution

infinitely many solutions

none of the choices

Answer: $(\frac{1}{3}, \frac{1}{2})$

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