Consider the line y=ax+2 (a is a constant) and the circle (x-3)^2+(y+4)^2-25. determine the values of a such that the line is a tangent to the circle.

i think you substitute y=ax+2 into the circle equation but im not sure what to do afterwards

Answer the following for 896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.