Equivalent expression 31/8 - 21/2

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Which table represents a linear function? i'll give brainliest to first answer ^'^

Are triangles the congruent? write the congruency statement. what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?