Find the largest open intervals where the function is concave upward.f(x) = -3x2 + 18x + 16
A. (-?, ?)
B. (-?, 3)
C. None
D. (3, ?)
Answer: C
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Solve the problem.Given that 
= 
,evaluate 
.
A. 
B. 
C. 
D. 
Solve.In calculating his weekly expenses, a contractor found that he had spent the following amounts: materials, $1569.54; labor, $2542.08; office help, $785.42; and overhead expenses, $543.96. What was his total weekly expense?
Fill in the blank(s) with the appropriate word(s).
Use the Factor Theorem to determine whether x - c is a factor of the given function for the given value of c. If x - c is a factor, then write f in factored form. That is, write f(x) = (x - c)(quotient).f(x) = x2 - 8x + 15; c = 5
A. Yes; f(x) = (x - 5)(x + 3) B. Yes; f(x) = (x + 5)(x + 3) C. Yes; f(x) = (x - 5)(x - 3) D. No
Find an equation of the line passing through each pair of points. Write the equation in the form 
(-4, 7) and (1, 9)
A. 11x + 8y = -61 B. 2x - 5y = -43 C. -11x - 8y = -61 D. -2x - 5y = -43