Can someone help me with this. Will Mark brainliest.

Find the vertex of the function given below y=x^2-6x+1

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

What expression is equivalent to 42x-56y