Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.
A. 2x2 - 30, no restrictions on x
B. 
, x ? 7
C. 
, x ? 7
D. 2x - 8, x ? 7
Answer: D
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Solve.Crystal enjoys skiing in the winter. Last year she skied 18 times and spent a total of $558. How much did it cost her each time?
A. $32 B. $540 C. $10,044 D. $31
Solve the system using substitution.
A. (7, 0) B. (0, -7) C. (1, -8) D. empty set; inconsistent system
Determine the real zeros of the polynomial and their multiplicities. Then decide whether the graph touches or crosses the x-axis at each zero.f(x) = 5(x - 4)(x - 6)3
A. -4, multiplicity 1, touches x-axis; -6, multiplicity 3 B. 4, multiplicity 1, touches x-axis; 6, multiplicity 3 C. -4, multiplicity 1, crosses x-axis; -6, multiplicity 3, crosses x-axis D. 4, multiplicity 1, crosses x-axis; 6, multiplicity 3, crosses x-axis
Provide an appropriate response.Evaluate 4 + (x3 - 2) for x = 5.
A. 127 B. 119 C. 123 D. 27