If a = (4,-5) and (7,-9), what is the length of line ab?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

In angle pqr find the measure of

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)