Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent nonnegative numbers.6 
- 8
+ 9 
+ 3
A. 15 
- 5
B. 15 
- 5
C. 15 
- 5
D. 10
Answer: C
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Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 150 km/hr. A second airplane approaches from the east at 202 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 28 km away from the airport and the westbound plane is 20 km from the airport.
A. -239 km/hr B. -358 km/hr C. -478 km/hr D. -119 km/hr
Find the quadratic function that fits the set of data points.(-2, 2), (1, 29), (-6, 50)
A. f(x) = -3x2 + 12x + 2 B. f(x) = 3x2 + 12x + 14 C. f(x) = x2 - 12x + 14 D. f(x) = 3x2 + 2x + 2
Classify the angle as acute, right, obtuse, or straight.
A. Straight B. Acute C. Obtuse D. Right
Solve.2 - x = -0.4
A. 1.6 B. 2.4 C. 1.9 D. 1.1