can you help me plz?

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1. Find the acute angle between y = 2x + 1 and y = -3x - 2 to the nearest degree.
2. Find the acute angle between 3x - 2y + 7 = 0 and 2y + 4x - 3 = 0 to the nearest degree.
3. Find the acute angle between y = x + 3 and y = -3x + 5 to the nearest degree.


THANK YOU IN ADVANCE