Question 1

Officials in a town use a function, C, to analyze traffic patterns. C(n) represents the rate of traffic through an intersection where n is the number of observed vehicles in a specified time interval. What would be the most appropriate domain for the function?

30

{0, 1, 2, 3, ...}

{0, ½, 1, 1 ½, 2, 2 ½}

{...-2, -1, 0, 1, 2, 3, ...}

{-2, -1, 0, 1, 2, 3}

Accepted Answer

{0, 1, 2, 3, ...}

Answer

{0, ½, 1, 1 ½, 2, 2 ½}

Answer

{...-2, -1, 0, 1, 2, 3, ...}

Answer

{-2, -1, 0, 1, 2, 3}

Question 2

If A = 3x² + 5x - 6 and B = -2x² - 6x + 7, then A - B equals

Accepted Answer

5x² + 11x - 13

Answer

5x² - x + 1

Answer

-5x² - x +1

Answer

-5x² - 11x +13

Question 3

Which value of x satisfies the equation $\frac{7}{3}$ (x + $\frac{9}{28}$ ) = 20?

Accepted Answer

8.25

Answer

8.89

Answer

44.92

Answer

19.25

Question 4

A company that manufactures radios first pays a start-up cost, and then spends a certain amount of money to manufacture each radio. If the cost of manufacturing r radios is given by the function c(r) = 5.25r + 125, then the value 5.25 best represents

Accepted Answer

the amount spent to manufacture each radio

Answer

the start-up cost

Answer

the average number of radios manufactured

Answer

the profit earned from the sale of one radio

Question 5

What are the roots of the equation x² + 4x -16 = 0?

Accepted Answer

-2 $\frac{7}{3}$ 2 $\frac{9}{28}$

Answer

2 $\frac{7}{3}$ 2 $\frac{9}{28}$

Answer

2 $\frac{7}{3}$ 4 $\frac{9}{28}$

Answer

-2 $\frac{7}{3}$ 4 $\frac{9}{28}$

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