The sum of two numbers is 140 and their difference is 20. what are the two numbers

The highest common factor of 132 and 220

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.

If the discriminant if a quadratic equation is 4 which statement describes the roots?