Ihad to write 3 4/5 as a fraction as part of my homework this is what i wrote 3 4/5= 4/5+4/5+4/5=12/5 my friend told me this is not correct. how can i write 3 4/5 as a fraction

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?