Write the expression in the form a + bi, where a and b are real numbers.
(
+ 
)
A. 10 - 20i
B. 20 + 10i
C. -20 - 10i
D. -10 + 20i
Answer: D
Mathematics
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Determine the measure of the interior angle at vertex A.
A. 60° B. 168° C. 120° D. 84°
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Use the distance formula d = rt, where d represents distance, r represents the rate, and t represents time.Dana is driving home from college for the holidays. Dana's house is approximately 175 miles from her school. If Dana drives at 70 mph, how long will it take her to make the trip home?
A. 2 hours B. 1 hours 30 minutes C. 2 hours 15 minutes D. 2 hours 30 minutes
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Find the domain of the function.f(x) = 
+ 
A. (-?, -9) ? (-9, 7) ? (7, ?) B. (-?, -9) ? (-9, ?) C. (-?, 7) ? (7, ?) D. (-?, ?)
Mathematics
Use a graphing calculator to estimate f '(a) for the given value of a.f(x) = 
; a = 2
A. 
B. -2
C. 0
D. 2
Mathematics