Solve and graph. Write the solution in interval notation.
- 9 ? 5
A. (-?, -6] ? [22, ?)
B. (-?, -6] ? [4, ?)
C. [-6, 22]
D. [ -4, 6]
Answer: A
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Solve the problem using the rule of 78s.A college student buys a used car for $5000. She makes a down payment of $1,100 and finances the balance at 8.5% APR over 24 months. Before making the 15th payment, she decides to pay the remaining balance on the loan. How much interest will the student save?
A. $53.18 B. $46.24 C. $58.49 D. $68.18
Perform the indicated operation.[(-10n2 + 4n - 9n3) + (6n2 + 9n + 4n3)] - n2
A. -5n3 - 3n2 + 13 B. 13n3 + 15n2 + 5 C. -5n3 - 5n2 + 13n D. -13n3 - 17n2 - 5
Determine the constant of variation for the stated condition.b varies directly as a, and b = 72 when a = 8.
A. k = 64
B. k = 11
C. k = 
D. k = 9
Provide an appropriate response.Use the FOIL method to show that (5x + 10)(x - 10) is 5x2 - 40x - 100. If you were asked to completely factor 5x2 - 40x - 100, why would it be incorrect to give (5x + 10)(x - 10) as your answer?
What will be an ideal response?