Provide an appropriate response.Find the direction in which the function is increasing most rapidly at the point P0.f(x, y) = xy2 - yx2, P0(1, 1)
A. 
i - 
j
B. 
i - 
j
C. 
i + 
j
D. 
i + 
j
Answer: D
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Use positive rational exponents to rewrite the expression.
A. x3/7 B. x1/21 C. x7/3 D. x3/21
Solve the rational inequality. Write the solution in interval notation.
< 2
A. 
? (3, ?)
B. 
C. (-?, -3) ? (3, ?)
D. (-?, -3) ? 
Solve the problem using the elimination method.A vendor sells hot dogs and bags of potato chips. A customer buys 4 hot dogs and 3 bags of potato chips for $9.00. Another customer buys 2 hot dogs and 5 bags of potato chips for $8.00. Find the cost of each item.
A. $1.50 for a hot dog; $1.00 for a bag of potato chips B. $1.75 for a hot dog; $1.25 for a bag of potato chips C. $1.00 for a hot dog; $1.50 for a bag of potato chips D. $1.50 for a hot dog; $1.25 for a bag of potato chips
Multiply.-8xy7(10xy6 + 5y5 + 5)
A. -80xy6 - 40y5 - 40 B. -80x2y13 - 40xy12 - 40xy7 C. -80x2y13 - 40xy12 D. -80x2y13 + 5y5 + 5