Question

Please help! I will mark as brilliant for true right answers!! Thanks.

Answer 1

21. 31.

22. 9.45

23. -2 1/5.

Explanation:

18 - (-13)

= 18 + 13

= 31.

Answer 2

21) n= -13 so replace the n with -13. you do 18- -13 which is 31

22) 9.45

23) -2.2