Add or subtract as indicated.(28x + 14xy - 19y) - (24x - 20xy - 10y)
A. 4x + 34xy - 9y
B. 14x - 4xy + 29
C. 29xy
D. 4x - 34xy - 29y
Answer: A
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Use dimensional analysis to solve the problem.The speed of sound under certain conditions is 1076 ft/sec. Calculate the speed in miles per hour. Round answers to the nearest tenths.
A. 733.6 mi/hr B. 737.6 mi/hr C. 12.2 mi/hr D. 2200.9 mi/hr
Write the equation of the line passing through the given points. Write your answer in slope-intercept form.Passing through 
and 
A. y = 
x + 
B. y = 9x - 
C. y = 
x + 
D. y = 9x - 
Use a graphical method to solve the system. Give x- and y-coordinates correct to the nearest hundredth.x2 + y2 = 7y = 
A. (-1.76, -1.98), (2.13, -1.57) B. (-2.13, -1.57), (1.76, -1.98) C. (-2.13, 1.57), (1.76, 1.98) D. (-2.29, -1.32), (2.29, 1.32)
Solve the equation by the zero-factor property.x2 + 7x - 18 = 0
A. {2, 9} B. {-9, 2} C. {-9, -2} D. {-2, 9}