The key to solving a two-step equation is isolating the
variable on one side of the equation. In which of the
following equations is the variable isolated?
A. x= 9/2 + 4
B.2x = 8
C.3x = 8 + 5
D. x = 5x - 4
I NEED THIS BY TODAY

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

What is the rotational symmetry of a wheel

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?