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kvv77 [185]
2 years ago
10

Solve the proportion for x. 12/x = 15/24 ​

Mathematics
2 answers:
jekas [21]2 years ago
7 0
1242 hope this helps
butalik [34]2 years ago
5 0

Answer:

i think x is 19.2

Step-by-step explanation:

solve x by cross multiplying

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A racing shell, which is a boat a crew team rows, moves 20 km/h in still water. During practice, the team rows 36 km against the
saveliy_v [14]

Answer:

2 km/h

Step-by-step explanation:

Let x represent the speed of the river current, t₁ be the time spent rowing against the current and t₂ be the time spent rowing with the current.

Since the speed of the still water = 20 km/h.

The speed of rowing against the current = (20 - x)

The speed of rowing with the current = (20 + x)

We know that velocity = distance / time. Hence time = distance / velocity

t₁ = 36 / (20 - x)

t₂ = 22 / (20 + x)

but t₁ + t₂ = 3 hours

Therefore:

3 = 36 / (20 - x) + 22 / (20 + x)

multiply through by 400 - x²

3(400 - x²) = 36(20 + x) + 22(20 - x)

1200 - 3x² = 720 + 36x + 440 - 22x

3x² + 14x -40 = 0

This gives x = -6.7 or x = 2

x cannot be negative therefore x = 2 km/h

The speed of the river current is 2 km/h

4 0
3 years ago
Read 2 more answers
I just need to find the value of b
WITCHER [35]

Answer:

straight line add up to 180 so subtract 42 from 180 thts ur answer

8 0
2 years ago
Find the area of a circle with a radius of 6 centimeters. Use 3.14 for π.
Nataliya [291]

Answer:

28.27

Step-by-step explanation:

Area = 1/4(3.14)(d^2)

Area = 28.27

8 0
3 years ago
Which is greater 3 miles or 5,000 yards? How much greater?
Brilliant_brown [7]
5,000 yards is greater
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3 years ago
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Help. help. help. help.​
Yuri [45]

Answer:

Step-by-step explanation:

8 0
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