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DaniilM [7]
3 years ago
14

It takes a boat 4 hours to travel downstream 84 miles and 5 hours to travel up stream 55 miles. What is the speed to the boat in

still water ? Mph what is the speed of the current ? Mph
Mathematics
1 answer:
Olegator [25]3 years ago
7 0

Answer:

16 MPH boat speed still water

5 MPH current speed


Step-by-step explanation:

84/4 - x = 55/5 + x

x = (84/4-55/5)/2 = 5 mph current speed in MPH

11+5 = 16 is boat speed in MPH

21 MPH downstream, 11 MPH upstream

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Evaluate the function requested. Write your answer as a fraction in lowest terms. Find sin A.
Dima020 [189]
Answer: 4 / 5

Explanation:

1) For a right triangle, the ratio sine is defined as:

sin(x) = opposite-leg / hypotenuse

2) x is the angle. In this case: A

3) As per the figure, the opposite leg to tha angle A measures 28

4) As per the figure, the hypotenuse measures 35

5) Calculations:

sin(A) = 28 / 35

Simplify dividing both numerator and denominator by 7 => 28/35 = 4/5
6 0
3 years ago
Divide 6 feet 6 inches by 5
tigry1 [53]
6 ft 6 in....
1 ft = 12 inches, so 6 ft = (12 * 6) = 72 inches...+ the other 6 inches = 78 inches

78 / 5 = 15.6 inches


5 0
3 years ago
Find the volume of a sphere with a diameter of 6.2 in.
Vsevolod [243]

Answer: its 23 meters

Step-by-step explanation:

4 0
3 years ago
i have 17 coins. N of them are nickels and the rest are dimes. write an expression in two different ways for the amount of money
sergiy2304 [10]

Answer:

0.05N - 0.1N + 1.7 (in dollars

1.7 - 0.05N (in dollars)

Step-by-step explanation:

Given :

Total number of coins = 17

Number of nickels = N

Number of dimes = 17 - N

1 nickel = 5 cent = $0.05

1 dime = 10 cent = $0.1

The amount of money :

(Value of nickel * number of nickels) + (value of dime * number of dime)

(0.05 * N) + (0.1 * (17-N))

0.05N + 1.7 - 0.1N

0.05N - 0.1N + 1.7

-0.05N + 1.7 = 1.7 - 0.05N

4 0
3 years ago
Pie =????????????????????.??
maria [59]
Hello there!

I can assume you mean "Pi".

Pi is an irrational number that has an infinity decimal, also known as a terminating decimal, which means to repeat infinitely.

The summarized form of Pi is 3.14, but since you have multiple units, I can assume you want the extended form.

Here it is:
3.14159265359

I hope this helps!
6 0
3 years ago
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