Devaughn's age is three times Sydney's age. The sum of their ages is 48. What is Sydney's age?

Chose the graph below that represents the following system of inequality’s

Angle that produces maximum distance

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels