3. write an expression using the fewest terms possible that is equivalent to x+x+x+x-20

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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.

Ill mark the brainliest if you me with the these three questions 7,8,9