I need help solving # 7, 8, 9, 10 for x​

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1