What is the area of these

What is the value of r of the geometric series?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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)