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The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

In the diagram, gef and hef are congruent. what is the value of x

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)