when you have history class, math, and english at the same time

9) -17
10) 0
11) -3
12) -21
13) 16
14) 15
i THINK these are right-

They are

do you need the work or just answers?

the answrs

1. r=10
2. -4
3. -9
4. 6
5. -4
6. 15

7. 8
8. -3