Is y=1-x to the second power linear or nonlinear

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 .

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

What is the result of the following division?