To find the sum of points \( R \) and \( Q \) given their values on the number line, we start with the following:
- Point \( R \) has a value of \( \frac{2}{5} \).
- Point \( Q \) has a value of \( \frac{1}{2} \).
We need to calculate \( R + Q \):
\[ R + Q = \frac{2}{5} + \frac{1}{2} \]
To add these fractions, we first need a common denominator. The least common multiple of 5 and 2 is 10. Now, we can convert both fractions:
\[ \frac{2}{5} = \frac{2 \times 2}{5 \times 2} = \frac{4}{10} \]
\[ \frac{1}{2} = \frac{1 \times 5}{2 \times 5} = \frac{5}{10} \]
Now we can add the two fractions:
\[ R + Q = \frac{4}{10} + \frac{5}{10} = \frac{9}{10} \]
Thus, the value of \( R + Q \) is \( \frac{9}{10} \).
So, point \( R + Q \) is located at \( \frac{9}{10} \) on the number line.