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Vikki [24]
3 years ago
6

The speed of the current in a river is 6mph. A ferry operator who works that part of the river is looking to buy a new boat for

her business. Every day, her route takes her 22.5 miles each way against the current and back to her dock, and she needs to make the trip in a total of 9 hours. She has a boat in mind, but she can only test it on a lake where there is no current at all. How fast must the boat go on the lake in order for it to serve the ferry operator's needs?

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
4 0
Hello,
Please, see the attached files.
Thanks.

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Tuto
Damm [24]

Answer:

8r+8pg-pq

Step-by-step explanation:

The subtractable pg cancels out one of the 9 pg's. So 9 pg-1 pg= 8 pg

Hope this helps!

8 0
3 years ago
Verify the identity: (1-sinx)/cosx = cosx/(1+sinx)
Tresset [83]
Cross multiply the expression so that we can get

(1+sinx)(1-sinx) = cos^2 x

1 - sin^2 x = cos^2 x

cos^2 x + sin^2 x = 1

since

cos^2 x + sin^2 x = 1 

therefore 

1 = 1

the two expressions are identical in a trigonometric sense
4 0
3 years ago
........................answer
Nataly [62]

Answer:

B

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
How to factor that polynomial
professor190 [17]
<h3><u>(1 + 5y)(1 - 5y) is the fully factored form of this polynomial.</u></h3>

This polynomial can be factored using difference of squares.

This polynomial is in the form of a^2 - b^2 = (a + b)(a - b)

Because 1 * 1 = 1, we can use this formula to simplify this polynomial.

1 - 25y^2 = (1 + 5y)(1 - 5y)

We can use FOIL to verify this.

(1 + 5y)(1 - 5y)

1 - 5y + 5y - 25y^2

1 - 25y^2

6 0
2 years ago
This is the question click it ​
IgorC [24]

Answer:

C.  

Step-by-step explanation:

5/8 = 20/32

20/32 ÷ 2 = 10/16

10/16 ÷ 2 = 5/8

8 0
3 years ago
Read 2 more answers
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