Simplify the polynomial by adding or subtracting, as indicated. Express your answer as a single polynomial in standard form.(5x9 + 4x8 - 8x7 + 5) - 
A. 3x9 + 6x8 - 12x7 + 13
B. 7x9 + 2x8 - 4x7 + 13
C. 3x9 + 2x8 - 4x7 - 3
D. 7x9 + 2x8 - 4x7 - 3
Answer: A
Mathematics
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Provide an appropriate response.Suppose that A is an m × n matrix and B is a p × q matrix. Under what conditions will the sum A + B exist?
A. The sum will always exist. B. The sum will exist if m = p and n = q. C. It is not possible for the sum to exist. D. The sum will exist if n = p.
Mathematics
Solve the problem.102 × 10-5
A. 10-10 B. 10-7 C. 10-3 D. 107
Mathematics
Find the circumference of the circle. Then use the approximation 3.14 for ? and approximate the circumference.
A. 82.08 in. B. 84.78 in. C. 42.39 in. D. 41.04 in.
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics