Rewrite the following equation in the center-radius form of the equation of a circle.
x2 - 6x + y2 - 8y + 21 = 0

A.
(x - 5)2 + (y - 3)2 = 4
B.
(x - 6)2 + (y - 8)2 = 4
C.
(x - 3)2 + (y - 4)2 = 4
D.
(x - 4)2 + (y - 6)2 = 4

Anyone know? is appreciated! will mark brainliest if correct!

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250