Answer:
x = ± 
Step-by-step explanation:
Given
5 - 2x² = - 15 ( subtract 5 from both sides )
- 2x² = - 20 ( divide both sides by - 2 )
x² = 10 ( take the square root of both sides )
x = ± 
Answer:
5/7
Step-by-step explanation:
Umm because the denominator 7 is less than 10 and 7 is the nearest number to 1/2
I hope it helps
Y8=40
You can divide 40 by 8 and you get 5. y=5
Answer:
4/20
I don't know fully if this is right.
Hope it helps.
Initial = 50lbs
1st 6 hours =100
2nd 6 hours = 200
3rd 6 hours = 400
After 18 hours it will be 750 pounds