What times what is equal to 343 has to be a # times a #

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

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1