Q41 correct

Q42 a little careful...

Let me see.

Peifen: 1 unit
Lili: 4 units
Dekai: 4 units - 365

Since Peifen and Dekai jogged 2800 m altogether,

1 unit + 4 units - 365 = 2800
5 units - 365 = 2800
5 units = 2800 + 365
5 units = 3165
1 units = 3165/5
1 unit = 633

4 units = 544 x 4
4 units = 2532

So, Lili jogged 2532 m altogether.

Note that Peifen jogged 633 m and Dekai jogged (2532 - 365) = 2167 m.

Check that 633 m + 2167 m = 2800 m.

The total should be 2600m not 2800m

Oops, my eyesight is bad. Never mind...

I update

Let me see.

Peifen: 1 unit
Lili: 4 units
Dekai: 4 units - 365

Since Peifen and Dekai jogged 2 600 m altogether,

1 unit + 4 units - 365 = 2600
5 units - 365 = 2 600
5 units = 2 600 + 365
5 units = 2 965
1 units = 2 965/5
1 unit = 593

4 units = 593 x 4
4 units = 2 372

So, Lili jogged 2 372 m altogether.

Note that Peifen jogged 593 m and Dekai jogged (2 372 - 365) = 2 007 m.

Check that 593 m + 2 007 m = 2 600 m.

Better?

Yes. Thanks for your help