CAN SOMEONE HELP ME PLEASE

What number should be added to both sides of the equation to complete this square? x^2-10x=7

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities