Question

Alicia recorded the temperature for five days. When he added the five temperatures together he got some of -7.4°C. If he recorded this number is -8.1 -7.4 5.5 6.2 But was missing one record what was in the missing temperature

Answer 1

Let's denote the missing value as $x$. Now we have a linear equation:

$$-8.1 - 7.4 + 5.5 + 6.2 + x = -7.4$$ $$-3.8 + x = -7.4$$ $$x = -7.4 + 3.8 = -3.6$$

So, the missing value is $x = -3.6$