Solve the differential equation.D2y + 14 Dy + 49y = 0
A. y = (C1 + C2x)e-7x
B. y = C1e-7x + C2e7x
C. y = (C1 + C2x)e7x
D. y = Ce-7x
Answer: A
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The algebraic expression has been translated to a word phrase that is ambiguous (unclear). Indicate why the translation is unclear and give a translation that is not ambiguous. 7(x - 9)Translation: seven times x minus nine
A. Mistake: could be translated as 7x - 9 Correct: nine less than seven times x B. Mistake: could be translated as 7 - 9x Correct: nine less than seven times x C. Mistake: could be translated as 7x - 9 Correct: seven times x decreased by nine D. Mistake: could be translated as 7x - 9 Correct: seven times the difference of x and nine
Find a system of inequalities with the given graph.
A. y > -4 x ? 3 B. y > 3 x ? -4 C. y > -4 x ? 3 D. y < -4 x ? 3
Simplify.
A. 13 B. 84 C. 14 D. Not a real number
Add. Write a mixed numeral for the answer.
A. 5
B. 5
C. 5
D. 6