Which statement is true regarding the diagram of circle P?

The sum of y and z must be 2x.
The sum of y and z must be 1/2x.
The difference of z and y must be 2x.
The difference of z and y must be 1/2x.

The mathematical expression 9€ t means

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

6x + 3y = -6 2x + y = -2 a. x = 0, y = -2 b. infinite solutions c. x = -1, y = 0 d. no solution