Which number can be added to the data so that the range of the data will be 55?
56, 81, 54, 47, 45, 94
49
98
39
6

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

How do you use the elimination method for this question? explain, because i really want to understand!

What is the result of adding the system of equations? 2x+y=4 3x-y=6