8.

Solve for x only using Cramers Rule.

x = 7

x = 9

x = 2

x = -3

9.

For the following ellipses determine location of its foci.

foci at (0, 2 + v11), (0, 2 - v11)

foci at (0, 5 + v21), (0, 5 - v21)

foci at (0, 3 + v25), (0, 3 - v25)

foci at (0, 1 + v36), (0, 1 - v36)

10. You are taking a multiple-choice test that has five questions. Each of the questions has three answer choices, with one correct answer per question. If you select one of these three choices for each question and leave nothing blank, in how many ways can you answer the questions?

198 ways

290 ways

243 ways

364 ways