Temperature change scenarios

In the morning, they measured the temperature at 5.7 degrees Celsius. What will the temperature be when:
A) warms by 6.3 degrees Celsius
B) cools by 0.9 degrees Celsius
C) cools down by 9 degrees Celsius and immediately warms up by 18.8 degrees Celsius
D) warms up by 4.3 degrees Celsius and then cools down by 19.3 degrees Celsius

Final Answer:

t₁ =  12 °C
t₂ =  4.8 °C
t₃ =  15.5 °C
t₄ =  -9.3 °C

Step-by-step explanation:

$$\begin{gathered} t_0=5.7\text{°C} \\ {t}_1=t_0+6.3=5.7+6.3=12\text{°C} \end{gathered}$$

$t_2=t_0-0.9=5.7-0.9=4.8\text{°C}$

$t_3=t_0-9+18.8=5.7-9+18.8=15.5\text{°C}$

$t_4=t_0+4.3-19.3=5.7+4.3-19.3=-9.3\text{°C}$

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