Simplify.

A.
B.
C.
D.

Answer: D

Mathematics

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Solve the initial value problem.Differential Equation: = (9t2 - 9)i - j + kInitial Condition: r(0) = -4i + 7j + 6k

A. r(t) = (3t³ - 9t - 4)i + (7 - t)j + ( - 4)k
B. r(t) = (3t³ + 9t + 4)i + (7 + t)j + ( + 4)k
C. r(t) = (3t³ - 9t - 4)i + (7 - t)j + (2 + 4)k
D. r(t) = (9t³ - 9t - 4)i + (7 - t)j + ( + 4)k

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Mathematics

What property of whole-number multiplication justifies the equality?(2 ? 6) ? 7 = 2 ? (6 ? 7)

A. Multiplicative-identity property B. Commutative property C. Distributive property D. Associative property

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Mathematics

Decide if the number is rational or irrational.

A. Rational B. Irrational

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Mathematics

Determine the specific solutions (if any) to the equation on the interval [0, 2?).tan ? + sec ? = 1

A. 0
B.
C. no solution
D.

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Mathematics