What is 7/9z-6/9z+2-5/9z-9

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Plz i want answer and i would appreciate it is is a b c or d

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .