Tim had 2b books for sale at a price of k dollars each. if y is the number of books he did not sell, which of the following represents the total dollar amount he received in sales from the books?

a. k(2b-y)
b. k(y-2b)
c. ky - 2b
d. 2b - ky
e. 2bk - y

For this case we have:

: Variable that represents the amount of books Tim had.

k: Variable that represents the price of each book

y: Variable that represents the quantity of books not sold.

Then we have, according to the statement that, the quantity of books sold is given by:

Thus, the total dollar amount received for the books sold are:

Option A

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.