Write an expression to state the problem and simplify.A stack of currency contains 50 bills. In the stack are x $20 bills. The rest are $50 bills. How much money is in the stack of bills?
A. 20x + 50(50 - x); -30x + 2500 dollars
B. 20x - 50(50 - x); 70x - 2500 dollars
C. 20x + 50(50 - x); 30x + 2500 dollars
D. Cannot be solved
Answer: A
Mathematics
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In the circuit below, VR = 14 V and VC = -8 V. Find E and é.
a. é = -29.45ø, E = 10.08 V
b. é = -29.74ø, E = 16.12 V
c. é = -60.55ø, E = 16.27 V
d. é = -34.85ø, E = 14.00 V
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Solve. Give an exact answer unless indicated otherwise.sin-1 x + 2 tan-1 x = ?
A. x = ± 
B. x = 1
C. x = ± 
D. x = 0
Mathematics