The specified vector or scalar. show your work. u = -4i + 1j and v = 4i + 1j; find ‖u +v ‖.

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)