Answer: [tex]6^{\circ}C[/tex]
Step-by-step explanation:
Given
The temperature in Canada at 6 am on Christmas was [tex]-5^{\circ}C[/tex]
By noon the temperature had risen by [tex]11^{\circ}C[/tex]
So, the temperature in Canada at noon is
[tex]\Rightarrow -5+11\\\Rightarrow 6^{\circ}C[/tex]