Provide an appropriate response.Solve the following system of equations by first solving Equation (1) for x and then substituting for x in Equation (2). Then solve the system again by first solving Equation (1) for 2y and substituting for 2y in Equation (2). Which procedure do you prefer? Explain why you answered as you did.?x + 2y = 6(1)3x + 2y = 4(2)
What will be an ideal response?
Answers may vary. The first procedure requires the use of the distributive law after the first substitution while the second does not. However, the second procedure requires the use of the multiplication principle in solving for the second variable while the first does not. Elsewhere, the two procedures require the same number of steps.
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A. 38.75 B. 8 C. 20 D. 40
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A. Domain: [3.1, ?); range: all real numbers B. Domain and range: all real numbers C. Domain: all real numbers; range: (-?, 3.1] D. Domain: all real numbers; range: [3.1, ?)
Use the quadratic formula to solve the equation.6x2 + 12x = - 3
A. 
B. 
C. 
D. 
Simplify.638 - 455
A. 1093 B. 173 C. 83 D. 183