The lengths of the sides of different triangles are given below. Which is a right triangle?
A. 8, 15, 16
B. 8, 6, 7
C. 9, 16, 18
D. 8, 15, 17
E. 8, 6, 6
Answer: D
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Translate the verbal phrase into a mathematical expression. Use x to represent the unknown number.Twice some number
A. 2 + x
B. 2 - x
C. 
D. 2x
Solve the problem.The current in the circuit is 7.00 mA. Determine the magnitude of the impedance across the combination of the capacitor, the resistor, and the inductors (between points a and d).XC = 2700 ?R = 1350 ?XL = 1500 ? 
? I
A. Z = 24 ? B. Z = 150 ? C. Z = 2018 ? D. Z = 3371 ?
Graph the equation by plotting points.y = x2 - 1
A. 
B. 
C. 
D. 
Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
C. x = 9; y = 2
D. x = 2; y = 