In the rectangle below, ac has a length of 28 units. what is the length of de

The answer would be A. 14 units.

Step-by-step explanation:

If AC is 28 units, and AC goes from one corner to the next, and DE is half of AC, that would make DE 14. Pretty much all you would have to do is divide AC in half since DE is half of AC.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.