Answer:
The low temperature last week was of -10ºC.
Step-by-step explanation:
The relation between temperatures in celsius(C) and Fahrenheit(F) is given by the following equation:
[tex]F = \frac{9C}{5} + 32[/tex]
Here, we have that [tex]F = 13[/tex], and we want to find C. So
[tex]13 = \frac{9C}{5} + 32[/tex]
[tex]\frac{9C}{5} = -19[/tex]
[tex]9C = -90[/tex]
[tex]C = - \frac{90}{9}[/tex]
[tex]C = -10[/tex]
The low temperature last week was of -10ºC.