Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.A barge takes 2 hours to move (at a constant rate) downstream for 16 miles, helped by a current of 3 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 8 hr
B. 2 hr
C. 32 hr
D. 5 hr
Answer: A
Mathematics
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Write as a percent. Round your answer to the nearest tenth, if necessary.
A. 83.3% B. 50% C. 5% D. 60%
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Combine like terms.6x + 8x
A. 48x B. -2x C. 14 + x D. 14x
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Divide.
A. -28
B. 18
C. -18
D. - 
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Find the slope and y-intercept of the line.x + 5y = 1
A. slope = -5; y-intercept = 5
B. slope = - 
; y-intercept = 
C. slope = 
; y-intercept = 
D. slope = 1; y-intercept = 1
Mathematics