A delivery truck driver travels 15 miles south to deliver his first package. He then goes 9 miles east and 6 miles north to deliver his next package. From there, he drove 12 miles east to make his last stop. How far is the driver from his starting point? Round to the nearest tenth of a mile.

1/4 because there is 4 grades.

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 terms in pattern b are 4 times the terms in pattern a