Solve quadratic equation by factoring.x(x - 4) = 60
A. 6, -10
B. -6, -10
C. 6, 10
D. -6, 10
Answer: D
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The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).y = x
A. r = sin ? B. r = cos ? C. sin ? = cos ? D. sin ? = - cos ?
Perform the indicated operations. Simplify the result.
- 
- 
A. 
B. 
C. 
D. 
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = x 
A. f-1(x) = x2 + 9
B. f-1(x) = x 
C. Not one-to-one
D. f-1(x) = x3 - 9
Solve the problem.Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, V, in volts, and the impedance of the circuit, Z, in ohms, by the formula 
Find the impedance, Z, when the voltage is 
and current is I = -3i amperes.
A. 
ohms
B. 
ohms
C. 
ohms
D. 
ohms