Add or subtract as indicated. Express the answer as a single polynomial in standard form.(2x5 - 5x3) + (3x5 + 3x3)
A. 5x10 - 2x6
B. 3x16
C. 3x8
D. 5x5 - 2x3
Answer: D
Mathematics
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Use the substitution method to solve the system.x - 7y = 50-4x - 8y = 16
A. (-8, -5) B. (7, -5) C. (8, -6) D. No solution
Mathematics
Perform the indicated operation.(2x2 - 11x + 11) + (-5x2 - 1x - 20)
A. -3x2 - 6x + 31 B. -3x2 + 12x - 9 C. -3x2 - 12x + 31 D. -3x2 - 12x - 9
Mathematics
Check the subtraction. If the subtraction has not been done correctly, find the correct answer.
A. Correct. B. Incorrect; 261 C. Incorrect; 371 D. Incorrect; 361
Mathematics
Solve the problem.How many liters of a 20%-alcohol solution must be mixed with 20 liters of a solution that is 80% alcohol to get a solution that is 40% alcohol?
A. 60 L B. 40 L C. 6 L D. 4 L
Mathematics