Multiply.(10i)(5i)
A. 50
B. -15
C. -50
D. 15
Answer: C
Mathematics
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Write the first four terms of the geometric sequence whose first term and common ratio are given.a = 
, r = -10
A. 
, - 4, - 40, - 400, . . .
B. 
, - 
, 
, - 
, . . .
C. 
, - 
, - 
, - 32, . . .
D. 
, - 4, 40, - 400, . . .
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Solve the system of equations algebraically for real values of x and y.
?
?
A. (6, 5) B. (5, 5) C. (7, 7) D. (5, 7) E. no solution
Mathematics
Find the limit algebraically.
A. -4 B. -2 C. Does not exist D. 1
Mathematics
Solve the equation for x.sin-1 
- cos-1 x = 0
A. ?
B. 
C. 
D. {0}
Mathematics