Simplify using the laws of exponents.(3xy5)2(2x4y2)3
A. 5x14y16
B. 72x14y16
C. 6x14y16
D. 6x10y12
Answer: B
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Find dy/dt.y = 4t(2t + 5)4
A. 4(2t + 5)4(6t + 5) B. 4(2t + 5)3(10t + 5) C. 4(2t + 5)3 D. 4(10t + 5)3
Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.A grain dealer sold to one customer 5 bushels of wheat, 2 of corn, and 3 of rye, for $39.60; to another, 2 of wheat, 3 of corn, and 5 of rye, for $34.80; and to a third, 3 of wheat, 5 of corn, and 2 of rye, for $33.60. Which of the grains was the cheapest?
A. Wheat B. Wheat and rye (tie) C. Corn and rye (tie) D. Corn
Solve the problem.The sum of two numbers is 72, and twice their difference is 24. What is the smaller of the two numbers?
A. 24 B. 48 C. 42 D. 30
Find the acute angle between the lines.8x - 7y = -3 and 9x - 7y = -7
A. 1.629 radians B. 1.512 radians C. 0.9983 radians D. 0.05832 radians