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alisha [4.7K]
3 years ago
6

It takes three hours for a boat to go 18 miles downstream, and nine hours to return. What is the rate of the boat in calm water

and the rate of the current?​
Mathematics
1 answer:
vampirchik [111]3 years ago
5 0

Step-by-step explanation:

Distance = rate × time

If B is the rate of the boat, and C is the rate of the current, then we can write two equations:

18 = (B + C) × 3

18 = (B − C) × 9

Simplifying the equations:

6 = B + C

2 = B − C

Add the equations together to eliminate C:

8 = 2B

B = 4

Plug into either equation to find C:

C = 2

The boat's rate is 4 mph, and the current's rate is 2 mph.

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3 0
3 years ago
Estimate 137,638 plus 52,091
seraphim [82]
First round
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8 0
3 years ago
Read 2 more answers
Brainliest if you provide a valid explanation and answer!
Hoochie [10]

Answer:

11cm = diameter.

c=circumference

d=diameter

π=3.14

r=half of diameter

34.56

C=2πr

d=2r

Solving for d (diameter)

d=C

π=34.56

π≈11.00079cm

rounded = 11cm!

You promised brainlest! Please!!

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
LUAHLILULL-----
Ann [662]

x+y=19 and 6.5x+3y=74.5 can be used to determine the number of gifts wrapped and number of giftbags prepared where x represents the wrapped gifts and y represents giftbags.

Step-by-step explanation:

Let,

x be the gift wrapped with wrapping paper.

y be the gifts in gift bag.

Time for wrapping one gift = 6.5 minutes

Time for doing 1 gift bag = 3 minutes

Total gifts = 19

Total time = 74.5 minutes

According to given statement;

x+y=19

6.5x+3y=74.5

x+y=19 and 6.5x+3y=74.5 can be used to determine the number of gifts wrapped and number of giftbags prepared where x represents the wrapped gifts and y represents giftbags.

Keywords: linear equation, addition

Learn more about linear equations at:

  • brainly.com/question/788903
  • brainly.com/question/774670

#LearnwithBrainly

3 0
3 years ago
What is the solution to the system of equations ?
Fudgin [204]

Answer:

A solution to a system of equations means the point must work in both equations in the system. So, we test the point in both equations. It must be a solution for both to be a solution to the system. Hope this helps.

7 0
3 years ago
Read 2 more answers
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