Sally and Bob go to the same college and are pursuing the same degree. Sally earned Scholarships and has a lower tuition cost. Sally has a tuition cost of $12,000 per year and Bob has a tuition cost of $18,000 per year. What is the percent decrease that Sally pays?

50%

25%

33%

75%

33%

Step-by-step explanation:

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.