Can someone help me I’m stuck on this and can’t figure it out

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=

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1