Which of the following sets contains all roots of the polynomial f(x)=2x^3+x^2-3x

The perimeter of a rhombus with a side of 6 is 24

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

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