Respuesta :

c. 5x+7=22 since diameter is equal to double the radius. radius=11 so diameter equals 22. then just make 5x+7 = to 22
The diameter is 2r -- two times the radius.
Radius = 11
Diameter = 5x + 7

Plug the radius and diameter into the equation D = 2r.
5x + 7 = 2(11) 

5x + 7 = 22
5x = 15
x = 3

The answer is C) 5x + 7 = 22.
The value of x is 3.