Domain and range of the graph

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b