Answer:
4.2 is your answer rounded to the nearest tenth.
Step-by-step explanation:
8/17 is equal to 0.470588235294.
In order to make an equivalent fraction with 9 as the denominator, divide 9 by 17 to get 0.529411764705.
Then, multiply 0.529411764705 by 8 to get 4.235294117647.
4.235294117647 is our <em>u</em><em>.</em>
Simplified to the nearest tenth it is 4.2.
we can double check our answer by taking 4.235294117647 divided by 9. You should get 0.470588235294.
Hope this helps!
Answer:
300.29
Step-by-step explanation:
The answer would be <span>y = 312.5x + 1564
hope this helped :)
alisa202</span>
Answer:
x = 387
Step-by-step explanation:
The wind acts in the opposite direction to the plane when the time is longer.
The wind acts in the same direction as the plane when the time is shorter.
Equation
d = r*t
Givens
- d = 1720
- x = plane's speed
- y = wind speed
- t1 = 5 hours
- t2 = 4 hours.
Substitution
- d = (x + y) * t
- 1720 = (x + y) * 4
- 1720 = (x - y) * 5
Since the two distances are the same, you can equate the right hand sides.
- (x + y) * 4 = (x - y)*5 Remove the brackets.
- 4x + 4y = 5x - 5y Add 5y to both sides
- 4x + 4y + 5y = 5x - 5y + 5y Combine all the terms.
- 4x + 9y = 5x Subtract 4x from both sides
- 9y + 4x - 4x = 5x - 4x Combine
- 9y = x
Now use one of the given equations with the distance
- 1720 = (x + y)*4 Substitute 9y for x
- 1720 = (9y + y) * 4 Combine
- 1720 = 10y * 4 Multiply the right
- 1720 = 40y Divide by 40
- 1720/40 = 40y/40 Do the division
- 43 = y y = wind speek
- 9y = x x = 9*y
- 9*43 = x
- x = 387 miles per hour.
