Determine whether the expression is a polynomial. If it is a polynomial, give its degree.
A. polynomial, degree 1
B. polynomial, degree 8
C. polynomial, degree 15
D. not a polynomial
Answer: D
Mathematics
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Find the focus and directrix of the parabola.x2 = -20y
A. (0, -5); x = 5 B. (0, -5); y = 5 C. (-5, 0); y = 5 D. (0, -5); y = -5
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Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
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Solve. Write your answer in simplest form.In a three-point shooting contest, a basketball player attempted 20 shots and made 15 of them. What fraction of his shots did the player make?
A. 
B. 
C. 
D. 4
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Simplify the expression. Write your answer without negative exponents. Whenever an exponent is negative or zero, assume that the base is not zero.
A. x13
B. -x3
C. 
D. 
Mathematics