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Find two rational expressions that have the difference of 2-n/n-4

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)