shown here, in °F, it was one-fifth of the corresponding value in °C. What would be the observed value?
°F=°C/5
C/5=F-32/9
C/5=(C/5)-32/9
9.C=5.[(C/5)-32]
9.C=5.C/5-160
9C=C-160
8C=-160
TC = -20°C
This value can be found in °F
-20/5=F-32/9
-4.9=F-32
-36+32=F
TF=-4°F