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Olenka [21]
3 years ago
9

????????????????????????????? can someone do this thanks

Mathematics
2 answers:
elixir [45]3 years ago
6 0

Answer:

32

Step-by-step explanation:

Because 15/24=1.6

Therefore 1.6*20=32

1.6*20 Because 20 is the laps and 1.6 is the minutes per lap.

shusha [124]3 years ago
5 0

Answer:

ima say 32 bc i used a calculator

Step-by-step explanation:

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A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m high
Agata [3.3K]

Answer:

dy/dt = 1.02 m/s

Step-by-step explanation:

First of all, let the distance of the dock above the bow of the boat be represented by x.

Also, let the distance of the boat from the dock be represented by y.

Let z represent the length of the rope.

Now, we can use pythagoras theorem to find a relationship between x, y and z since they form a right angle triangle where the vertical part is the dock, the base represents the water and the hypotenuse represents the rope.

Thus;

x² + y² = z²

Using implicit differentiation, we have;

2x(dx/dt) + 2y(dy/dt) = 2z(dz/dt)

We are given that the dock is 1 meter above the bow. Thus, x = 1

Also, the height is not changing and so dx/dt = 0

We are told the dock is 5 feet away from the boat. Thus, y = 5

dy/dt is is the speed we are looking for which is the rate at which the boat is approaching the dock.

We are not given the value of z but we can find it by using pythagoras theorem since we know the dock is 1 meter above the bow and the boat is 5 m away.

Thus;

z = √(1² + 5²)

z = √26

We are told the rope is being pulled in at the rate of 1 m/s. Thus; dz/dt = 1

Plugging all relevant values into the differentiation equation above gives;

2(1)(0) + 2(5)(dy/dt) = 2(√26)(1)

10(dy/dt) = 2√26

Divide both sides by 10 to get:

dy/dt = (√26)/5

dy/dt = 1.02 m/s

5 0
3 years ago
Find the value of each variables in the parallelogram
xenn [34]

Answer:

A = 28

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Step-by-step explanation:

18 + 10 = 28

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3 years ago
rope price of length 45cm 25 cm and 81 cm have to be cut into same size pieces what is the smallest price length possible​
Sergeeva-Olga [200]

= 2025

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For this, you divide the given lengths using the numbers that divides all through.

I have added an image to this answer. Go through it for more explanation

5 0
2 years ago
Factorise mx+cx+my+cy<br> With steps!!!<br> x=algebra x
avanturin [10]

Step-by-step explanation:

Hey there!

While factorising you remember to make it take common in most of the expression.

Here;

=mx+cx+my+cy

Take common 'x' in "mx+cx" and 'y' in my + cy.

= x(m+c) + y(m+c)

Now, "(m+c)" common again.

= (m+c) (x+y)

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2 years ago
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What is the area as a product and area as a sum of (x + 2)(x + y – 2) ?
Brilliant_brown [7]

Answer:

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Step-by-step explanation:

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