Add or subtract. Express the answer as a mixed number.1
+ 1
A. 3
B. 1
C. 3
D. 2
Answer: C
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Find a value of a so that f is continuous at c, or indicate this is impossible.f(x) = 
A. -2 B. 5 C. Impossible D. 2
In work with alternating current, complex numbers are used to describe current I, voltage E, and impedance Z. These three quantities are related by the equation E = IZ. Solve the equation E = IZ for the missing variable.I = 11 + 8i, Z = 9 + 2i
A. E = 115 + 94i B. E = 99 + 110i C. E = 99 + 16i D. E = 83 + 94i
Solve the problem using the quadratic formula.For a car traveling at x mph, stopping distance is estimated by the formula d(x) = 
x2 + 
x. Find a (maximum) safe speed for a stopping distance of 630 ft. Round your answer to the nearest mph.
A. 65 mph B. 70 mph C. 73 mph D. 61 mph
Graph the inequality on a number line. Then write the solution in interval notation.x < -4
A. (-?, -4]
B. (-?, -4)
C. (-4, ?)
D. [-4, ?)