9a and it has a little 2 at top of the a i dont understand how to solve

X2 + y2 - 20x + 8y + 115 = 0 What is the center of this circle? What is the radius of this circle?

What is 9 minus 3 and 7/8

What is the notation for 72.4

Which equation has a constant of proportionality equal to 15?

A store purchased a DVD for 12.00 and sold it to a costumer for 50 percent more than the purchase price. The costumer was charged a 7 percent tax when the DVD was sold. What was the customer total cost for the DVD?

A reader should try to determine the structure of what he is reading. True False

What are the multiples of 46

Suppose that a company has just purchased a new computer for $3200 The company chooses to depreciate using the straight-line method for 4 years. a) write a linear function that expresses the book value of the computer as the function of its age.

A white-tailed deer can sprint at speeds up to 30 miles per hour. American bison can run at speeds up to 3,520 feet per minute. Which animal is faster and by how many miles per hour? There are 5,280 feet in one mile

What is the order of transformations you would use to solve this equation. 4x - 17 = - 45 A. Subtract 17 from both sides Divide both sides by 4 B. Add 17 to both sides Divide both sides by 4 C. Add 17 to both sides .