Solve the system by the substitution or the addition method.
A. 
B. (5, 1)
C. Infinite number of solutions
D. No solution
Answer: C
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Answer the given question.Where are all points whose coordinates have the same sign?
A. In first or second quadrant B. In third or fourth quadrant C. In second or fourth quadrant D. In first or third quadrant
Make an approximate conversion as indicated. Round to the nearest tenth. The precise value of your approximation will depend on the conversion path that you choose.3.1 yd = 
m
A. 2.8 m B. 23.6 m C. 78.7 m D. 122.0 m
The loudness L(x), measured in decibels, of a sound of intensity x, measured in watts per square meter, is defined as 
watt per square meter is the least intense sound that a human ear can detect. Determine the loudness, in decibels, of the sound.At a recent Phish rock concert, sound intensity reached a level of 0.50 watt per square meter. To the nearest whole number, calculate the loudness of this sound in decibels.
A. 117 decibels B. 112 decibels C. 107 decibels D. 123 decibels
Simplify.
÷ 
? 
A. 
B. 2
C. 
D. 1