Part B: which phrase provides the best clue to the meaning of the word “thwart”?

To hinder, impede or frustrate someone from achieving a set goal.

Explanation:

Thwart could either be a noun or a verb, the context determines its part of speech when used in a sentence

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

answer:

a. "there, said he, there is something for you."

explanation:

"said he" should not have been part of what is in the dialogue.