Help asap!! the row- echelon form the augment matrix of a system of equations is given

4. find the geometric mean of 4 and 12. 24 8

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.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)