10x+2/2=4x+.25 help please

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Select 2 statements that are true about the equation y+6=-10(x-3).1) the slope of the line is -102) the slope of the line is 33) one point on the line is (3,6)4) one point on the line is (3,-6)

Can someone tell me if this is perpendicular? !