Somebody please help its due today thank you​

approximately 52.752 or 16.8

Step-by-step explanation:

a) we know the diameter so we can use the formula r=d/2 to solve for the radius

b)16.8/2 =8.4

  2. Then we substitute into the equation

a)2r

b)2(8.4)

c)52.752 or 16.8

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

correct answer:

b.(19,-2)