Which method should be used to solve the system? Explain your answer, including a description of the first step.5x2 - 6y2 =16-7x - 7y =-7
What will be an ideal response?
Substitution should be used, because using elimination would mean introducing an xy term into the second equation unnecessarily. The second equation should be solved for x or y.
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Solve the problem.At Rhonda's diner, four loaded baked potatoes and three cheeseburgers provide 3750 calories. One loaded baked potato and five cheeseburgers provide 2850 calories. Find the calorie content of each item.
A. A loaded baked potato has 640 calories, and a cheeseburger has 410 calories. B. A loaded baked potato has 600 calories, and a cheeseburger has 450 calories. C. A loaded baked potato has 580 calories, and a cheeseburger has 470 calories. D. A loaded baked potato has 610 calories, and a cheeseburger has 440 calories.
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Simplify.82 - 2 ? 3 ? 6
A. 456 B. 71 C. 46 D. 1440
Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 