Find the equation of a hyperbola with vertices at (−1, −1) and (−1, 7) and foci at (−1, 8) and (−1, −2).

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Which of the following shows the length of the third side, in inches, of the triangle below

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?