How many solutions does this system of equations have?

x/4+y/9=27
3x/2+2y/3=19

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

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).

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4