Multiply.(x - 2y)(9x - 4y)
A. 9x2 - 22xy - 22y2
B. 9x2 - 22xy + 8y2
C. x2 - 22xy - 22y2
D. x2 - 22xy + 8y2
Answer: B
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Give a verbal statement equivalent to the given inequality involving the number x.x < 6 or x ? 16
A. x is less than or equal to 6, or x is greater than or equal to 16. B. x is less than 6 and x is greater than or equal to 16. C. x is greater than 6 and less than or equal to 16. D. x is less than 6, or x is greater than or equal to 16.
Evaluate the integral.
dx
A. 
- ln
- 5 tan-1 x + ln(x2 + 1) + C
B. 
- 3 tan-1 x + 
ln(x2 + 1) + C
C. 
- ln 
+ 
ln(x2 + 1) + C
D. 
- ln
- 3 tan-1 x + 
ln(x2 + 1) + C
Solve the radical equation. Check all proposed solutions.
= x
A. x = - 
B. no solution
C. x = 9
D. x = -3, 9
Provide an appropriate response.If Adb = 20 log 
and Vin = 20 V and Vout = 500 mV, then Adb =
A. -32.0 db B. -64.1 db C. 64.1 db D. 32.0 db