I’m not sure I only answer these for the points :)
Answer:
Step-by-step explanation:
Let he speed of the boat on the lake is x.
<u>Considering the speed of the current it will take him:</u>
- 22.5/(x + 6) + 22.5/(x - 6) = 9
- 2.5 / (x + 6) + 2.5 / (x - 6) = 1
- 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
- 2.5*2x = x² - 36
- x² - 5x - 36 = 0
- x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
- x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
Step-by-step explanation:
Simple
We will subtract
21 - 16 = 5
So 5 more students can join the class
Write full questions is that....
The volume is 96.
v=l*w*h
v=6*3*3=54
v=2*3*7=42
54+42=96
Hope this helps
