Which statements describe a parabola? check all that apply

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

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 negative 3/9 times negative 2/8 ?