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Mademuasel [1]
3 years ago
12

Change 20 m/s in km/h

Mathematics
2 answers:
Nataly [62]3 years ago
8 0

Answer:

72km/h

Step-by-step explanation:

the formula of changing metres per second to km/h is 18/5 and kilometre per hour into metres per second is 5/8 in hope it helps.

stepladder [879]3 years ago
3 0
The answer is: 72 km/h
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Helppp please i need this asap
Solnce55 [7]
I believe it’s 5,832,000

5^3 (5 times 5= 25 times 5= 125)^6(750 times 6= 4,500 etc)
4 0
4 years ago
???? Help me please
Mama L [17]

Answer:

24.5672 cm² (answer rounded up to four decimal places)

Step-by-step explanation:

The area of the shaded region = The area of the circle with a diameter of 6.4 cm - the area of the two circles with diameters of 2.2 cm each

The area of the circle with a 6.4 cm diameter is:

Area(A) = π × r²

The radius here is \frac{6.4 cm}{2} = 3.2 cm

A = π × 3.2² = 32.1699087728  cm² or 32.1699 cm² (rounded up to four decimal places)

The area of the the circles with diameters of 2.2 cm each is:

Area(A) = π × r²

But because the circles are two, the area will be;

A = 2 × π × R²

The radius here is 2.2 cm ÷ 2 = 1.1 cm

A = 2 × π × 1.1² = 7.60265422169  cm² or 7.6027 cm² (rounded up to four decimal places)

The area of the shaded region = 32.1699 cm² - 7.6027 cm² = 24.5672 cm²

5 0
3 years ago
Choose the correct solution. graph the inequality. -3x>24
Elden [556K]
X<-8 if you are to graph this solution you would get this answer sorry i couldnt explain it well i struggled a little to

6 0
3 years ago
The set of the consecutive odd numbers 1, 3, 5, 7, ... , N has a sum of 400. How many numbers are in the set?
Amanda [17]

Well, we could try adding up odd numbers, and look to see when we reach 400. But I'm hoping to find an easier way.

First of all ... I'm not sure this will help, but let's stop and notice it anyway ...
An odd number of odd numbers (like 1, 3, 5) add up to an odd number, but
an even number of odd numbers (like 1,3,5,7) add up to an even number.
So if the sum is going to be exactly 400, then there will have to be an even
number of items in the set.

Now, let's put down an even number of odd numbers to work with,and see
what we can notice about them:

         1, 3, 5, 7, 9, 11, 13, 15 .

Number of items in the set . . . 8
Sum of all the items in the set . . . 64

Hmmm.  That's interesting.  64 happens to be the square of 8 . 
Do you think that might be all there is to it ?

Let's check it out:

Even-numbered lists of odd numbers:

1, 3                                   Items = 2, Sum = 4
1, 3, 5, 7                           Items = 4, Sum = 16
1, 3, 5, 7, 9, 11                 Items = 6, Sum = 36
1, 3, 5, 7, 9, 11, 13, 15 . . Items = 8, Sum = 64 .

Amazing !  The sum is always the square of the number of items in the set !

For a sum of 400 ... which just happens to be the square of 20,
we just need the <em><u>first 20 consecutive odd numbers</u></em>.

I slogged through it on my calculator, and it's true.

I never knew this before.  It seems to be something valuable
to keep in my tool-box (and cherish always).


3 0
3 years ago
SOMEONE PLEASE HELP ME! I've been stuck on this for over 3 hours and i really need help! I'm offering 40 points!
Ne4ueva [31]

Answer:

x\geq 8.6

Step-by-step explanation:

This problem requires subtraction, then division.. The first step is to add 9.5 to each side of the inequality. This isolates 6x on one side and makes the equation easier to understand:

-9.5+9.5+6x\geq 42.1+9.5\\6x\geq 51.6

Next, you need to divide each side by 6 to get your answer:

\frac{6x}{6}\geq  \frac{51.6}{6} \\x\geq 8.6

As a little bonus tip, if you ever end up dividing each side by a negative number, you MUST reverse the sign.

4 0
4 years ago
Read 2 more answers
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