What is the least common multiple of 20, 15, and 10?

1. are the triangles similar and if so why? what is the value of x? show your work.

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.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?