Answer: 707 km/h
Step-by-step explanation:
let c = speed of current
16.5 + c = speed of sailboat downstream
16.5 - c = speed of sailboat upstream
distance = travel time * speed
﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋
2(16.5 + c) = 5(16.5 - c)
33 + 2c = 82.5 - 5c
7c = 49.5
c = 7.07 km/h
Factor by grouping.
(7x+2)(x-2) I think not sure
By definition, the volume of a sphere is:
![V = \frac{4}{3} (\pi) (r ^ 3) ](https://tex.z-dn.net/?f=V%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%20%28%5Cpi%29%20%28r%20%5E%203%29%0A)
Where,
r: sphere radio
Substituting values we have:
![V = 5273.99424 ](https://tex.z-dn.net/?f=V%20%3D%205273.99424%0A)
Rounding the result to the nearest tenth:
Answer: the sphere's volume is:
The garden's width is 45. We know this because
![35 \times 2](https://tex.z-dn.net/?f=35%20%5Ctimes%202)
(length)
![35 \times 2 + 2x = 160 \\](https://tex.z-dn.net/?f=35%20%5Ctimes%202%20%2B%202x%20%3D%20160%20%5C%5C%20)
35x2 is 70 and you need to neutralize that by taking away 70 from both sides.
![160 - 70 = 90](https://tex.z-dn.net/?f=160%20-%2070%20%3D%2090)
![2x = 90](https://tex.z-dn.net/?f=2x%20%3D%2090)
Now divide by 2 on both sides to neutralize the 2 times x.
![90 \div 2 = 45](https://tex.z-dn.net/?f=90%20%5Cdiv%202%20%3D%2045)
meaning that leaves us with
Answer:
D: {-4, -2, 1}
R: {39, 9, -10}
Step-by-step explanation: