What is an equation of the line that passes through the points (-5,4) and (5, -8)?

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)?