Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.-  +  ÷  ? 

A. - 
B.
C. - 
D. - 


Answer: B

Mathematics

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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 

A. 1 B. 0 C. 2 D. No limit

Mathematics

Solve the problem.In the study of electrical circuits, the impedance of electron flow in an alternating-current (AC) circuit is expressed as a complex number. The total impedance in an AC circuit connected in series is the sum of the individual impedances. If the impedance in one part of the circuit is  ohms and in another part is  ohms, what is the total impedance in the circuit?

A. (-10 - 7i) ohms B. (-10 + 7i) ohms C. -10 ohms D. (-20 + 21i) ohms

Mathematics

Solve the equation by the method of your choice. Simplify irrational solutions, if possible.(7x + 9)2 = 64

A.
B.
C.
D.

Mathematics

Solve.If an electromagnetic signal moves at the speed of light, about 186,282 miles per second, how long will it take this signal to travel from Miami, Florida to Fairbanks, Alaska, approximately 4100 miles? (Hint: Time = distance ÷ speed.)

A. 0.02 seconds B. 42 seconds C. 0.04 seconds D. 45 seconds

Mathematics