Answer:
17.5 miles per hour
Step-by-step explanation:
A boat travels upstream on a Mississippi river for 3.5 hours
The return trip takes 2.5 hours
The boat travels 2 miles per hour faster downstream
Let y represent the speed that was travelled upsteam
3.5y = 2.5(y + 2)
3.5y = 2.5y + 5
3.5y - 2.5y = 5
y = 5
Therefore the distance travelled by the boat upstream can be calculated as follows
= 3.5 × 5
= 17.5 miles per hour
1/2 radian ≈ 28.648°
Multiply by 180°/π to convert from radians to degrees.
As the comments state, the velocity is the derivative of the position.
Therefore, the velocity as function of time is:
ds / dt = 24 + 6t - 3t^2.
That is a parabola whose maximum is (1,27). With that you know that the velocity will never be either 63 m/s or 81 m/s.
Also, you know that the velocity at t = 1 s is 27 m/s.
And, you can also find that the velocity at t = 3 is 15 m/s.
I am confident on that this analysis solves your question. Else, insert a comment.
Answer:
The answer is y=1.5x
Step-by-step explanation:
When you do 4 x 3, that gets you 12, but on the table it says 6. You can get rid of that option.
When you do 4+2, it gets you 6. But when you do 6+2, it gets you 8. On the table it says 9. You can get rid of that option.
When you do 4 x 2, you get 8, but the table says 9. You can get rid of that option.
That then only leaves you with 1.5, which works with all of the values.
Answer:
2/3
Step-by-step explanation:
66.66 percent is closest to the fraction 2/3.
