Which equation has the same solution(s) as X2+6x+1=0

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building