Solve the System of Equations $$\begin{array} { l } \frac { x ^ { 2 } } { 81 } + \frac { y ^ { 2 } } { 49 } = 1 \\- 7 x + 9 y = - 63\end{array}$$

question 100

Multiple Choice

Solve the system of equations.
- $$\begin{array} { l } \frac { x ^ { 2 } } { 81 } + \frac { y ^ { 2 } } { 49 } = 1 \\- 7 x + 9 y = - 63\end{array}$$

• A) \(\{ ( - 7,0 ) , ( 0,9 ) \}\)
• B) \(\{ ( 0,7 ) , ( - 9,0 ) \}\)
• C) \(\{ ( 7,0 ) , ( 0 , - 9 ) \}\)
• D) \(\{ ( 0 , - 7 ) , ( 9,0 ) \}\)

Identify and describe skills and concepts that develop in concrete operational stage.

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