In a certain shipment of 13 phones, 8 are defective. 7 of the phones are selected at random without replacement. What is the probability that 5 of the 7 phones are defective?

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

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.

- (2, -7)

- lines r and s and lines t and u must be parallel