What do you know about the Pythagorean Theroem easy question just answer

Aline passes through the point (2, -4) and has a slope of 0, what is the equation of the line? plz fast

Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)