Amath teacher wants to find out the average number of hours his students spend working on their math homework for his class each week. which group best represents a sample of the population?

the answer is C. 30 students selected from his class roster.

Step-by-step explanation:

it would take 7/10 of an hour too fill the pool.

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.