20,000,000 + 400,000 + 80,000 + 4,000 + 100 + 60 + 3
yes, negative divided by a negative is positive
a negative multiplied by a negative is also positive
Answer:
8
Step-by-step explanation:
Set up a ratio problem:
25 hours/2 tests = 100 hours/x
25x = 200
x = 8
Supplementary angles sum up to 180°, suppose the supplement of 161° is x. Then
161+x=180
solving for x we subtract 161 from both sides
161-161+x=180-161
x=19
thus the supplement is 19°
