What is 5 + 5 + 9 + 3 - 10 x 4 - 8 + 9 - 7 - 1 + 9 x 6

X+ y = k 2x + 3y = k + 1 the point of intersection of the lines has an x-coordinate of a.2k + 1 b.-2k + 1 c.2k - 1

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

Ineed with number 6 , explain how to get 1978