Average of 766 and 878

Use the numbers in the multiplication equation 45 x 1/9 =5 to write a division equation involving division by a fraction.

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

Can someone me with these two circle theorem questions asap?