Write the expression with positive exponents. Then simplify if possible.7-1 + 6-1
A. 
B. 
C. 2
D. 1
Answer: A
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. 6x - 2y - 4z = 0 B. 6x + 2y - 2z = 0 C. 6x - 2y - 4z = 6 D. 6x + 2y - 2z = 6
Suppose that y is directly proportional to x. Use the given information to find the constant of proportionality k. Then use y = kx to find y for the given value of x.y = 39 when x = 6;
Find y given x = 12.
A. k = 6.5; y = 78
B. k = 6.5; y = 90
C. k = 234; y = 
D. k = 6.25; y = 75
Multiply. Assume that all variables represent natural numbers.(x3n - y)(x2n- 6y2n)
A. x5n- 6x3ny - x2ny2n + 6y2n+1 B. x5n- 7x3ny2n + 6y2n+1 C. x5n- 6x3ny2n - x2ny + 6y2n D. x5n- 6x3ny2n - x2ny + 6y2n+1
Determine whether the function is a polynomial function.f(x) = 
- x4 + 2
A. No B. Yes