Can someone help me with these questions?

Q: The sum of 7 and u is 14
Q: Jamal and Keisha went running. Jeusha ran 2.4 miles more than Jamal. If Keisha ran 8.5 miles, how many miles did Jamal run?
Q: Phil solved the question x + 235.12 = 310.21, and found the solution to be 545.33. Is he correct? If not, what was his mistake?

The answers r

1. c or k=722

2. d or F=288.68

3. b or 2.4+m=8.5; m=6.1

4. a or 7+u=14; u=7

5. c or No he is not correct, because x=75.09. Phil added 235.12 to 310.21 instead of subtracting
I know I'm correct because I submitted the test before i posted these answers to make sure I was correct.

the answers are

1. k=722
2.f=288.68
3.2.4+m=8.5;= 6.1miles
4.7+u=14; u=7
5.no he is not correct because x=75.09 Phil added 235.12 to 310.21 instead of subtracting
I got a 100% if you don't trust me its okay, also i did this on connexus.

7 + u = 14

I'll be glad to check your answers for the other two problems.

7+7=14 u is seven

thanks

thanks twice 100%

ok not gonna lie anime lover we dont know wat you talking about, just give us the answer please and thank you