Answer:
6.4 kmph
Step-by-step explanation:
12.8/2=6.4 kmph
4400 - 3600 = 800
Decrease = 800 Calories
Original value was 4400 Calories.
Now,

After Rounding off,
Decrease percentage will be 18 %
63, when multiplying negatives with negatives it cancel each other out.
It's the first one.
If you work backwords, I'd say it's easier. 3y swuared is 9y2, and 11 squared is 121. Then just keep the sign the same
Question: Where is the y2? Please be more specific!