Solve by completing the square.2x2 + 8x - 41 = 0
A. 
B. 
C. 
D. 
Answer: A
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Find Pk+1 from the given statement Pk.Pk: 5 + 10 + 15 + . . . + 5k = 
A. Pk+1: 5 + 10 + 15 + . . . + 5k + 5(k + 1) = 
B. Pk+1: 5 + 10 + 15 + . . . + 5k + (5k + 1) = 
C. Pk+1: 5 + 10 + 15 + . . . + 5k + 5(k + 1) = 
D. Pk+1: 5 + 10 + 15 + . . . + 5k + (5k + 1) = 
Rewrite the quadratic equation in the form ax2 + bx + c = 0, then identify a, b, and c. x = -0.8x2 + 13.9
A. a = -0.8, b = 13.9, c = -1 B. a = -0.8, b = -1, c = -13.9 C. a = --0.8, b = -1, c = -13.9 D. a = -0.8, b = -1, c = 13.9
Round to the indicated place value.Round to the nearest thousandth: 310.79892
A. 310.7989 B. 310.800 C. 310.799 D. 310.798
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. 98 mph B. 48 mph C. 149 mph D. 73 mph