It's really easy but i'm having trouble!

20/20 - 5/20 + 8/20

Step-by-step explanation:

1 - 1/4 + 2/5

Denominator:  4 x 5 = 20

So

   1 = 1 x 20/20 = 20/20

1/4 = 1/4 x 5/5   = 5/20

2/5 = 2/5 x 4/4 =  8/20

Now you have

1 - 1/4 + 2/5 = 20/20 - 5/20 + 8/20

20/20 - 5/20 + 8/20

.19875994384

step-by-step explanation:

1699/ 8548

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4