1. Derek adds water to a pool at a rate of 12 gallons per minute and then reduces the
rate to 8 gallons per minute. Derek adds water to the pool for a total of 2 hours. Lett
be the time in hours that he adds water to the pool at the faster rate. Write algebraic
expressions to represent how many minutes he adds water to the pool at each rate.

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.

the answer is a.

135 and 80

step-by-step explanation: