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Darina [25.2K]
3 years ago
5

Please help with this. i can even give brainliest!!!!

Mathematics
1 answer:
son4ous [18]3 years ago
5 0

Answer: i think 10

Step-by-step explanation:

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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
vampirchik [111]

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.

5 0
3 years ago
An object has a mass of 12kg. On planet A the object weighs 69N. The force of gravity on planet a is:
astraxan [27]

w = mg  

w/m = g  

69N / 12kg = 5.75 N/kg

<u>Answer: B) 5.75 m/s2</u>

8 0
3 years ago
If two supplementary angles are in the ratio of 4:5 the measure of the larger angle is
dimulka [17.4K]

Answer:

Step-by-step explanation:

Let the angles be 4x , 5x

4x + 5x = 180   { supplementary}

      9x = 180

        x = 180/9

        x = 20

Larger angle= 5x = 5* 20 = 100

6 0
3 years ago
A hungry elf ate 14 of your muffins Thats was 7/10 of all of them! how many are left?
Dennis_Churaev [7]
6 muffins are left.  Here's how you do it:
take 14 and divide it by 7 which equals 2.
Then multiply it by 3 which equals 6
hope this helps!
5 0
3 years ago
Solve 3x - 6y = – 1 for y
umka2103 [35]

Answer:

Step-by-step explanation:

3x - 6y = -1

-6y = -1 -3x

-6y = -(1+3x)

   y = -(1+3x)/-6

y = (1 + 3x )/6

7 0
3 years ago
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