Find the missing complex number.(7 - 9i)(?) = 9 + 2i
A. 
+ 
i
B. 
+ 
i
C. - 
+ 
i
D. - 
+ 
i
Answer: B
Mathematics
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Use the given information to find the exact value of the trigonometric expression.sin ? = - 
; 
< ? < 2?
Find cos(2?).
A. 
B. - 
C. 
D. - 
Mathematics
State the domain of the rational function. h(x) = 
A. (-?, -9) ? (-9, 7) ? (7, ?) B. (-?, -10) ? (-10, 10) ? (10, ?) C. (-?, ?) D. (-?, 7) ? (7, ?)
Mathematics
Use multiplication shortcuts to find the product.5 × 100
A. 600 B. 5000 C. 500 D. 50
Mathematics
Solve the system by the addition method.4x2 - 4y2 = -483x2 + 2y2 = 44
A. {(-2, -4), (-4, -2)} B. {(2, -4), (2, 4)} C. {(2, 4), (4, 2), (-2, -4), (-4, -2)} D. {(2, 4), (-2, 4), (2, -4), (-2, -4)}
Mathematics