Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation.x2 - 5x ? -4
A. (-?, 1]
B. [4, ?)
C. [1, 4]
D. (-?, 1] ? [4, ?)
Answer: D
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Solve the problem.A force of magnitude 20 pounds pulling on a suitcase makes an angle of 30° with the ground. Express the force in terms of its i and j components.
A. 0.8660i + + 0.5000j B. 17.32i + 10.00 j C. 10.00i + 17.32j D. 3.085i - 19.76j
Solve the problem.When going more than 38 miles per hour, the gas mileage of a certain car fits the model 
where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. Based on this model, at what speed will the car average 15 miles per gallon? (Round to nearest whole number.)
A. 149 mph B. 73 mph C. 48 mph D. 98 mph
Subtract.-80 - (-22)
A. -58 B. 102 C. 58 D. -102
Write an equation for the quadratic function whose graph contains the given vertex and point.Vertex (2, 2), point (3, 4)
A. P(x) = 3x2 - 8x - 10 B. P(x) = 2x2 - 8x + 10 C. P(x) = 2x2 - 2x + 2 D. P(x) = -2x2 - 8x + 2