If i add 9 to my number, i get six what is my number?

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need