1 + 1. Help me please

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

On a piece of paper, graph y< x-1. then determine which answer choicematches the graph you drew.13. z3. 2(3.290-1)