Provide an appropriate response.Explain in your own words why possible solutions of radical equations must be checked.
What will be an ideal response?
The square of a number is equal to the square of its opposite. Thus, while squaring both sides of a radical equation allows us to find the solutions of the original equation, this procedure can also introduce numbers that are not solutions of the original equation.
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Decide whether the relation is a function.{(-6, -1), (-5, 4), (-2, -7), (2, 5)}
A. Function B. Not a function
Solve the problem.A Ferris wheel has a diameter of 340 feet and the bottom of the Ferris wheel is 8 feet above the ground. Find the equation of the wheel if the origin is placed on the ground directly below the center of the wheel, as illustrated. 
A. x2 + y2 = 28,900 B. x2 + (y - 170)2 = 115,600 C. x2 + (y - 170)2 = 28,900 D. x2 + (y - 178)2 = 28,900
Solve.The sum of a number and 5 times its reciprocal is 6. Find the number.
A. 1 or 5 B. 5 C. 1 D. 6
Find the expected value for the random variable x having this probability function.
A. 45 B. 55 C. 50 D. 50.5