Decide whether the pair of lines is parallel, perpendicular, or neither.3x - 6y = 818x + 9y = 7

A. parallel
B. perpendicular
C. neither


Answer: B

Mathematics

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A.   + 
B.   + 
C.  + 
D.   + 

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Find the limit.

A. ? B. 0 C. Does not exist D. -?

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Solve the problem.It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 70 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?

A. 28 L B. 17.5 L C. 23.3 L D. 35 L

Mathematics