Find the product.5mn(5m2 - 4mn + 5n2)
A. 25m3n - 4mn + 5n2
B. 25m3n + 20m2n2 + 25mn3
C. 25m3n - 20m2n2 + 25mn3
D. 25m2n - 20mn+ 25mn2
Answer: C
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II. 
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The graphing calculator screens show a system and the point of intersection. Choose the screen which best represents the given system.3y + 3 = 2xy = -3
A. 
B. 
C. 
D. 
Find the measure of the dihedral angle indicated.The figure shown is a right prism whose bases are regular nonagons. Find the measure of the dihedral angle between adjacent lateral faces.
A. 40° B. 144° C. 140° D. 90°
Solve the problem.If the resistance in an electrical circuit is held constant, the amount of current flowing through the circuit is directly proportional to the amount of voltage applied to the circuit. When 
are applied to a circuit, 
of current flow through the circuit. Find the new current if the voltage is increased to 
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