It is telling me to use compatible numbers to estimate the percent of 19% of 30

What are the sotions to the quadratic equation 9x^2=4

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Use the distributive law to multiply. 3(4x + 5y + 6)