Determine the number of teens in the geometric series if a=3 r=5 and Sn=11718

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.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

In the diagram, gef and hef are congruent. what is the value of x