If an angle of a parallelogram is two-third of its adjacent angle, the smallest angle of the parallelogram is.

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

After rain, water soaks into the ground and is added to the groundwater. this process is known as a. groundwater pollution. b. groundwater recharge. c. groundwater recycling. d. groundwater filtration.

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