Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = -10x2 - 2x - 7
A. vertex 
intercept (0, 7) 
B. vertex 
intercept (0, -7)
C. vertex 
intercept (0, -7) 
D. vertex 
intercept (0, 7) 
Answer: C
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Use the unpaid balance method to find the finance charge on the credit card account. The last month's balance and any other transactions are given.Last month's balance, $505; payment, $206; interest rate, 20%; bought camera, $84; bought jacket, $126
A. $12.70 B. $8.62 C. $15.49 D. $517.42
Express as a single logarithm and, if possible, simplify.5logb t - logb s
A. logb 
B. logb t5 ÷ logb s
C. logb 
D. logb (t5 - s)
Solve the rational inequality and graph the solution set on a real number line. Express the solution set in interval notation.
? 0
A. [1, 7]
B. (1, 7]
C. (-?, 1) or [7, ?)
D. (-?, 7]
Graph the function.f(x) = 
A. 
B. 
C. 
D. 