Multiply.(x - 5)(-3x + 7)
A. -3x2 + 22x + 22
B. -3x2 + 22x - 35
C. -3x2 - 35x + 22
D. -3x2 + 20x - 35
Answer: B
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Solve the problem.Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $14,000 when the dealer opened five years ago and $55,000 this year. Let x = 0 represent the year the dealer opened. Find the equation giving yearly sales y.
A. y = 41,000x + 14,000 B. y = 41,000x + 55,000 C. y = 8200x + 55,000 D. y = 8200x + 14,000
Factor the polynomial f(x). Then solve the equation f(x) = 0.f(x) = x3 - 10x2 + 27x - 18
A. (x - 1)(x - 3)(x - 7) ; 1, 3, 7 B. (x - 1)(x - 3)(x - 6) ; 1, 3, 6 C. (x - 1)(x + 3)(x - 6) ; -1, 3, -6 D. (x + 1)(x - 3)(x + 6) ; -1, 3, -6
Find the instantaneous rate of change of the function 
when x=3.
What will be an ideal response?
Which method should be used to solve the system? Explain your answer, including a description of the first step.x2 + y2 =818x - 5y =6
What will be an ideal response?