Express in terms of i.
A. 5
B. -5i
C. -5
D. 5i
Answer: D
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Write the interval as an inequality involving x. Graph the inequality.[-1, 3]
A. -1 < x ? 3
B. -1 < x < 3
C. -1 ? x < 3
D. -1 ? x ? 3
For the function find the maximum number of real zeros that the function can have, the maximum number of x-intercepts that the function can have, and the maximum number of turning points that the graph of the function can have. f(x) = 7x2 - 10 + 0.12x - 9x3
A. 3; 3; 2 B. 3; 3; 3 C. 2; 2; 2 D. 2; 2; 1
Use the Leading Coefficient Test to determine the end behavior of the polynomial function.f(x) = (x - 2)(x - 1)(x + 2)2
A. y ? -? as x ? -? and y ? ? as x ? ? B. y ? ? as x ? -? and y ? -? as x ? ? C. y ? -? as x ? -? and y ? -? as x ? ? D. y ? ? as x ? -? and y ? ? as x ? ?
Use the given information to write an equation. Let x represent the number described in the exercise. Then solve the equation and find the number.When 4 times a number is subtracted from 7 times the number, the result is 21. Find the number.
A. 4x + 7x = 21; 3 B. 4x(7 - x) = 21; -7 C. 7x - 4x = 21; 7 D. 4(x - 7) = 21x; 0.6