Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the initial value problem.u''(x) = 12e2x - 12e-2x, u(0) = 8, u'(0) = 14
A. u = 3e2x + 3e-2x + 2x + 8 B. u = 3e2x - 3e-2x + 2x + 8 C. u = 3e2x + 3e-2x + 2x - 8 D. u = 3e2x - 3e-2x - 2x - 8
Mathematics
Multiply using the rule for finding the product of the sum and difference of two terms.(x2 + 7)(x2 - 7)
A. x4 - 14 B. x4 - 49 C. x4 + 14x2 - 49 D. x4 - 14x2 - 49
Mathematics
Convert the repeating decimal to a fraction.0.
A. 
B. 
C. 
D. 
Mathematics
Write the number as a product of prime factors.249
A. 32 × 83 B. 3 × 83 C. 32 D. 3 × 81
Mathematics