Given ax2 + bx + c, what are the solutions

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

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?