What is the slope of the line that goes through (-1, – 7) and (3, 9)?

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Solve the triangle. a = 21°, c = 105°, c = 5

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