Use Matrices to Solve the System of Equations (If Possible) $$\left\{ \begin{aligned}2 x + 9 y & = - 35 \\- 9 x + 2 y & = 30\end{aligned} \right.$$

question 38

Multiple Choice

Use matrices to solve the system of equations (if possible) .Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. $$\left\{ \begin{aligned}2 x + 9 y & = - 35 \\- 9 x + 2 y & = 30\end{aligned} \right.$$

• A)x = -3,y = -4
• B)x = 4,y = 3
• C)x = -4,y = -3
• D)x = -3,y = 4
• E)no solution

Understand the concept of maturation in development and its biological basis.

Grasp the fundamental principles of cognitive development, including schemas, assimilation, and accommodation.

Recognize the sequence and characteristics of Piaget's stages of cognitive development.

Understand the importance of maturation in acquiring physical abilities and cognitive skills.

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An instrument that measures and records the electrical activity of the brain.