What value(s) of x is/are not allowed for the following rational expressions? Please include the solutions. ​

Which of the following expressions is equal to 2x^2+8

What is the prime factorization of 230

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units