Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.
A. {(5, -3)}
B. {(0, 7)}
C. {(x, y) 
}
D. ?
Answer: C
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Find a formula for the inverse of the function described below.An organization determines that the cost per person of chartering a bus is given by the formula 
where x is the number of people in the group and C(x) is in dollars.
A. C-1(x) = 
B. C-1(x) = 
C. C-1(x) = 
D. C-1(x) = 
Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.5(cos 120° + i sin 120°)
A. 
+ 
i
B. - 
+ 
i
C. - 
+ 
i
D. 
+ 
i
Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = 5x4 - 40x3 + 81x2 - 8x + 16
A. -4, 4; f(x) = (x - 4)(x + 4)(5x2 + 1) B. -4, multiplicity 2; f(x) = (x + 4)2(5x2 + 1) C. 4, multiplicity 2; f(x) = (x - 4)2(5x2 + 1) D. no real roots; f(x) = (x2 + 16)(5x2 + 1)
The function f is one-to-one. Find its inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = 