Simplify and solve ( use the 4 step of solving )

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

What is the number 321,000,000 in scientific notation? also what is the number? ?

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)