Imagine two planets orbiting a star with orbits edge-on to the earth. the peak doppler shift for each 75 m/s , but one has a period of 9 days and the other has a period of 900 days. the star has a mass of one solar mass. assume 1 solar mass equals 2? 1030 kg.
a) calculate mass in kg of the short period plant.
b) calculate mass in kg of the longer period planet

The answer would be (c), mass extinctions

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].