The equation of the line in slope-intercept form

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9