The school student council sponsored a switch day where students were able to switch classes every 20 minutes. the students are in school for 7 hours. if a student switched as often as possible, how many classrooms in all did that student visit? (hint there are 60 minutes in 1 hour)

ian gone lie this got me confused

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.