ACC - CQI - 9/28-10/1

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Which linear inequality represents the solution set graphed?

• 2x + 3y ≥ 6

• 2x + 3y ≤ 6

• 3x + 2y ≥ 6

• 3x + 2y ≤ 6

Which graph models the equation -2x + y = 4?

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Which of the points does NOT satisfy the inequality shaded in the diagram?

• (4, 0)

• (0, 0)

• (-3, -2)

• (-10, -1)

Choose the graph which represents the solution to the inequality: x ≤ -4x + 15

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Michael is helping to plan a family reunion. A park charges $200 plus a charge of $2 per person to rent out its pavilion for the day. This situation can be represented by the equation y = 2x + 200 where y is the total cost and x is the number of people attending the reunion. Another local park charges the same deposit, but $3 per person. What should be changed in the equation y = 2x + 200 to represent this situation?

• Switch the x and y in the equation

• Change the slope of 2 to a slope of 3.

• Change the y-intercept of 2 to a y-intercept of 3.

• Change the y-intercept of 200 to a y-intercept of 3.

Hailey has a summer job at the water slide park. She earns $9.50 an hour as a lifeguard, but never works more than 25 hours in a week. She determines that her salary is modeled by the function s = 9.5h.

What is the domain of this function in this situation?

• s ≤ 237.50

• all real numbers

• {0 ≤ h ≤ 25}

• {0 ≥ h ≥ 25}

If the function f(y) = n models the number, n, of inches a tree grows in a year, y, which describes an appropriate domain for the function?

• all integers where y > 0

• all integers where y ≥ 0

• all rational numbers where y > 0

• all rational numbers where y ≥ 0

The linear equation has 9(x + 3) = 3(3x + 6) + 9

• no solution.

• one solution.

• two solutions.

• infinitely many solutions.

Solve the following for c.

 $E=mc^2$  

•  $c=\frac{E}{m}$  

•  $c=\frac{m}{E}$  

•  $c=\pm\sqrt{\frac{m}{E}}$  

•  $c=\pm\sqrt{\frac{E}{m}}$