5x=-4y+4; x= 1,2,3 solve equation then find value of y

What is the vertex form of f(x) = x2 + 6x + 3

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

(05.08a)triangle abc is transformed to similar triangle a′b′c′ below: a coordinate plane is shown. triangle abc has vertices a at 2 comma 6, b at 2 comma 4, and c at 4 comma 4. triangle a prime b prime c prime has vertices a prime at 1 comma 3, b prime at 1 comma 2, and c prime at 2 comma 2. what is the scale factor of dilation? 1 over 2 1 over 3 1 over 4 1 over 5