### Home > MC1 > Chapter 4 > Lesson 4.3.4 > Problem4-123

4-123.

Use the values given below for the lengths in the diagrams from problem 4-122 to find the total length of each segment. For example, if $x$ were equal to $3$ units in part (a) of problem 4-122, the line segment would be $3 + 1 + 3 = 7$ units long.

1. Part (a) using $x=4\frac{1}{2}$

Remember that the expression for part (a) is $x + 1 + x$.
If you put in the value for $x$ and simplified the expression, what answer would you get?
${4\frac{1}{2}+1+4\frac{1}{2}=10}$
2. Part (b) using $m = 4$
Look back at part (b) of 4-122. Using the expression you wrote, substitute $4$ for ''$m$'' and simplify the expression.
3. Part (c) using $y = 5.5$