Consider the system of equations:

2x1+ 3x2 -2x3 = 5y1 +2y2 -3y3 +200
x1+ 4x2 +3x3 = 6y1 - 4y2 +4y3 -120
5x1 + 2x2 - x3 = 2y1 -2y3 +350

a. Write this system of equations in matrix form. Define the vectors and matrices you introduce.
b. Rewrite in matrix form with all the variables on the left side (and just numbers on the right).

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.

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?

Which are the possible side lengths of a triangle?