Find the constant that should be added to the expression to make it a perfect square.x2 + 16x + ?
A. 256
B. 64
C. 8
D. 16
Answer: B
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Solve the problem using Gaussian elimination.Three machines together produce 170 parts each hour. Twice the production of the second machine is 
more than the sum of the production of the other two machines. If the first machine operates for 
and the others operate for 9 hours, 
are produced. Find the production rate of each machine.
A. 60 parts/h, 30 parts/h, 80 parts/h B. 60 parts/h, 80 parts/h, 30 parts/h C. 80 parts/h, 60 parts/h, 30 parts/h D. 30 parts/h, 60 parts/h, 80 parts/h
Multiply.(-0.5)(-14.4)
A. 7.2 B. -14.9 C. 14.9 D. -13.9
Factor completely.x3y - 5x2y2 + 4xy3
A. xy(x2 - 5x + 4y2) B. x(xy - 1y2)(x - 4y) C. y(x - 1y)(xy - 4y2) D. xy(x - 1y)(x - 4y)
Solve.The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 4 amperes when the resistance is 699 ohms. What is the current when the resistance is 336 ohms? Round to the nearest hundredths when necessary.
A. 0.12 amperes B. 8.32 amperes C. 1.92 amperes D. 0.52 amperes