Pls answer 17 18 and 19 show your work will give brainliest

Which expression converts 45 degree to radians

Find the distance between (7,-6) and (-3,-9)

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6