W + 4 = (-6) This is an algebra question and I don't get the negative

Write the rational number in lowest terms 99/-15

Is this a polynomial function? i need to know asap

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle