(4 - 7m) - (-n + 2m - 1) pls helppp

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

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 the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons