Consider u = {x|x is a positive integer greater than 1}. which is an empty set? {x|x ∈ u and 1/2x is prime} {x|x ∈ u and 2x is prime} {x|x ∈ u and 1/2x can be written as a fraction} {x|x ∈ u and 2x can be written as a fraction}

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6