Round off the approximate number as indicated.2090 2 significant digits
A. 2000
B. 2100
C. 290
D. 2200
Answer: B
Mathematics
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Solve for x and graph the solution.6x + 11 ? 10x - 21
A. x ? -8
B. x ? -8
C. x ? 8
D. x ? 8
Mathematics
Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal places.[5(cos 20° + i sin 20°)][4(cos 10° + i sin 10°)]
A. 17.3205 + 10.0000i B. 0.8660 + 0.5000i C. 0.5000 + 0.8660i D. 10.0000 + 17.3205i
Mathematics
Divide. Simplify, if necessary.2 ÷ 
A. 
B. - 18
C. - 
D. 2
Mathematics
Determine the value of each variable.
= 
A. a = 8; x = 8 B. a = -1; x = 8 C. a = 8; x = -1 D. a = -1; x = -1
Mathematics