Solve using the substitution method. Use a graphing calculator to check your answer. x + y = -1x - y = 9
A. (3, -4)
B. (-4, -4)
C. (4, -5)
D. No solution
Answer: C
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Determine if the ordered pair is a solution of the equation. Remember to use alphabetical order for substitution.(5, 7); x + y = 12
A. Yes B. No
The old lady jumping rope in the cartoon at the figure below is counting one at a time. Assume that she jumps the rope 50 times per minute and that she jumps 7 hours a day, 4 days a week, 30 weeks a year. Estimate the length of time necessary for her to jump the rope the number of times indicated in the cartoon.
?
?
A. 21,748.6 centuries B. 21,750.1 centuries C. 21,747.1 centuries D. 21,748.1 centuries E. 21,748.2 centuries
Factor completely.2x2 + 8x - xy - 4y
A. (4x - y)(x + 2) B. (2x - y)(x + 4) C. (2x - 4)(x + y) D. (2x + y)(x - 4)
Solve.6k-2 - 3k-1 - 3 = 0
A. 
, -1
B. - 2, 1
C. - 
, 1
D. 2, - 1