What is the missing step in the proof?

30 in the diagram line e and made parallel to each other and line p and q are transversal. use properties of special angles formed by parallel lines and their transversals to find the missing angle measures. m< 3=65 m< 15=120 m< 7= m< 4= m< 6= m< 1= m< 16= m< 18= m< 21= m< 10= m< 11= m< 12=

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers