Use the substitution method to solve this system:
A. (45 reserved, 45 general)
B. (35 reserved, 55 general)
C. (25 reserved, 65 general)
D. (55 reserved, 35 general)
Answer: A
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Provide an appropriate response.A painter can paint a house in 6 days. Another painter can paint the same house in 4 days. If they work together, how long will it take them to paint the house?
A. 10 days
B. 2
days
C. 5 days
D. 
days
Perform the conversion.0.67 L = ___ kL
A. 67 B. 0.0067 C. 670 D. 0.00067
Write a system of equations to describe the problem situation. Use guess and check to solve the problem.
An airplane flies westbound from Denver to San Francisco (950 miles) with the wind in 3.8 hours. On a return flight against the same wind, the travel time is 5 hours. Find the speed of the wind, w. A) w = 45 mph B) w = 40 mph C) w = 35 mph D) w = 30 mph E) w = 25 mph
Simplify.
A. 13 B. 84 C. 14 D. Not a real number