Solve the problem.A lumber company sold shelves. A customer could choose 3 types of wood, 5 different widths, and 6 different lengths. How many different types of shelves could be ordered?
A. 48 types
B. 14 types
C. 90 types
D. 45 types
Answer: C
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Find the angle between u and v in radians.u = 3i + 3j + 8k, v = 10i + 4j + 10k
A. 1.15 B. 1.16 C. 0.41 D. 1.49
Solve the problem.A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
A. Bike: 13 mph
Hike: 3 mph
B. Bike: 11
mph
Hike: 1
mph
C. Bike: 14
mph
Hike: 4
mph
D. Bike: 12 mph
Hike: 2 mph
Solve the quadratic equation using the quadratic formula. Express the solution in standard form.5x2 = -9x - 7
A. 
B. 
C. 
D. 
Add or subtract as indicated.(7x2 - xy - y2) + (x2 + 9xy + 6y2)
A. 8x2 + 10xy + 7y2 B. 7x2 + 9xy + 6y2 C. 6x2 - 10xy - 7y2 D. 8x2 + 8xy + 5y2