Answer:
Part 1)
![LN=5.5\ units](https://img.qammunity.org/2021/formulas/mathematics/college/dqle2vwyb0vq0cxpot4l1tuxercezsqxcb.png)
Part 2)
![MN=2\ units](https://img.qammunity.org/2021/formulas/mathematics/college/50ck8c8kdt52gwyn19w5cy7rs6rn1h7llr.png)
Explanation:
Part 1) What is the length of LN?
To find out the length LN subtract the coordinate of L from the coordinate of N
so
![LN=3-(-2.5)\\LN=3+2.5\\LN=5.5\ units](https://img.qammunity.org/2021/formulas/mathematics/college/n2jp4epyy499gorgew1sx5o5cx6gmnc8dr.png)
Part 2) What is the length of MN?
To find out the length MN subtract the coordinate of M from the coordinate of N
so
![MN=3-(1)\\MN=2\ units](https://img.qammunity.org/2021/formulas/mathematics/college/bkefyt1i31qxh83jcfp8lez7sfjzpprgox.png)