The radius of a circle is 16.3 millimeters

What expression is equivalent to 1/2(2+3x-6)

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.

Tan198=asin164=? how to solve this? ?