What is six hundred twenty-nine thousandths written in standard form

For the equations below which statement is true ? -2x=14 6x=-42

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?