worth 20 pointss answer asap and i mark first one brainliest if both are wrong or first one correct with brainliest.

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)

(x-5)1/2+5=2 what is possible solution of this equation

Interpret the following expression (5y^2-7)^3/(2y)^2