Solve the problem.Find the combined impedance of the circuit elements in the figure below. The frequency of the current is 70 Hz. 80 ? 
85 ?F50 mH
A. Z = -4.74 + 0.28j ?
B. Z = 0.28 - 4.74j ?
C. Z = 80 - 4.76j ?
D. Z = -4.74 - 0.28j ?
Answer: B
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Estimate the answer by rounding as indicated.Estimate by rounding to the nearest hundred.
A. 700 B. 300 C. 200 D. 219
Solve the problem.One fifth of Mary's earned income is deducted from her paycheck for withholdings. Three fourths of the withholdings are for taxes. What fraction of Mary's earned income is deducted for taxes?
A. 
B. 
C. 
D. 
Translate the sentence into an equation. Use x to represent the unknown number. A number increased by 11 equals 30.
A. 11x = 30 B. x + 11 = 30 C. x + 30 = 11 D. 30x = 11
An arithmetic sequence is given. Find the common difference and write out the first four terms.{sn} = 
A. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
B. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
C. d = 
; s1 = 
, s2 = 
, s3 = 
, s4 = 
D. d = 
; s1 = 
, s2 = 
, s3= 
, s4 = 