What is the measure of angle Z?

C. 61

Step-by-step explanation:

add angles s and r together to find the sum of the line, 78+49= 119

then, subtract 180 with 119 which equals 61. you subtract 180 because thats the sum of the 3 degrees of a tirangle

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.

2

step-by-step explanation: