Can someone tell me what this is?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

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)