Answer:
0 degrees
Step-by-step explanation:
If the temp. -9 then +9 it would 0 out.
the new temp is 0.
-9+9= 0
the one on the bottom left, with 23 all by its lonesome
2n+6=20
-6 -6
2n=14
÷2 ÷2
n=7
2:5
david=24mins
mark = 1hour
change 1 hour to mins
DAVID=24
MARK=60
24:60
THEN SIMPLIFY
24/60
<em>=</em><em>2</em><em>/</em><em>5</em>
<em><u>2</u></em><em><u>:</u></em><em><u>5</u></em>