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coldgirl [10]
3 years ago
8

What does ‘? m/s = 25.2 km/h’ mean and how do you complete it? Thanks x

Mathematics
2 answers:
NISA [10]3 years ago
5 0

Answer:

Answer is 7

Step-by-step explanation:

you can see in above picture

madreJ [45]3 years ago
4 0

Step-by-step explanation:

This is a unit conversion problem it seems.

Basically, you're trying to take 25.2 km/h and turn that into m/s.

Let's convert hours to seconds first, so you can sort of see what I mean:

\frac{25.2km}{1 hour}*\frac{1hour}{60 minutes}*\frac{1minute}{60seconds}

So now we've done the first part of the equation, dealing with hours to seconds. See how we now have seconds in the denominator instead of hours? (Keep in mind, we don't want to multiply everything until the very very end!)

Now let's turn kilometers into meters (kilo- means thousand):

*\frac{1000meters}{1kilometer}

Now that we have that, let's multiply out the full equation to get our answer!

\frac{25.2*1000}{60*60} =7

Therefore our answer is the nice and satisfying 7.

Answer:

7

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Vedmedyk [2.9K]
It depends on what you are rounding off to.

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If you are rounding off to the nearest hundred, you must look at the ten number.

In this case I think they are asking to round to the nearest hundred. Now we must look at the ten number, which is the number after the 'hundred' number.

The ten number is '5' and the hundred number is '1'. If the ten number is 5 or above, it changes to 0 and it makes the hundred number one higher.

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3 years ago
Jody has 4 red marbles, 6 blue marbles, and 9 yellow marbles. What is the ratio of red marbles to blue marbles?
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Answer:

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Step-by-step explanation:

First, create the ratio by putting the numbers together:

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3 years ago
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stepan [7]
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Then, take each equation and make it equal zero.

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Add 7 to both sides.

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Divide both sides by 3.

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Now, we do our second equation.

2x + 3 = 0

Subtract 3 from both sides.

2x = -3

Divide both sides by 2.

x = -3/2

So, x = 7/3 AND x = -3/2

So, your answer is C) x = 7/3, x = -3/2

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raketka [301]

Answer:

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Step-by-step explanation:

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