When simplifying rational expressions, how is it similar to simplifying fractions?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

True or false? a circle could be circumscribed about the quadrilateral below.

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )