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3 years ago

I need help with this .

Mathematics

1 answer:

vaieri [72.5K]3 years ago

7 0

I would be glad to help you! I will solve through 3 to get you started.

This is a very important concept, so it would be helpful if you learn it on your own.

C= 2* pi* r

1. The radius is 5 cm. 5 cm represents r in the equation.
C= 2* 3.14 (or pi)* 5
Multiply it by using a calculator.
My answer was 31.4.

Let's try the second one.
2. The diameter is 9. Have of the diameter is the radius.
9/2= 4.5
Plug it into the equation.
C= 2*3.14*4.5
I got 28.26

One more.
Plug it into the equation.
C= 2*3.14*5.6
35.17 was my answer.

Make sure to add the end signs to you answer, ft, cm, meter, etc.

Let me know if you need more help.

Brainliest answer is always appreciated.

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If I have 2 sticks of butter and need 2. How much do I need???

Wewaii [24]

You just stated how much you need. You need 2.

7 0

3 years ago

Read 2 more answers

phobe, Andy and polly share £270 phobe gets 3 times as much as Andy who gets twice as much as polly work out how much they each

Lady bird [3.3K]

Answer:

<h2>Andy = £ 60</h2><h2>Phobe=£ 180</h2><h2>Polly= £ 30</h2>

Step-by-step explanation:

Let ,

Andy gets £ X

Phone gets 3x

Polly gets y = X/2

Andy gets 2y

2y = X

Now,

$x + 3x + \frac{x}{2} = 270 \\ \frac{x \times 2 + 3x \times 2 + x}{2} = 270 \\ \frac{2x + 6x + x}{2} = 270 \\ \frac{9x}{2} = 270 \\ 9x = 270 \times 2 \: ( \: cross \: multiplication) \\ 9x = 540 \\ x = \frac{540}{9} \\ x = 60$

Replacing values,

$phobe \: gets = 3x \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3 \times 60 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 180$

$polly \: gets = \frac{x}{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{60}{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 30$

Hope this helps...

Good luck on your assignment..

4 0

3 years ago

Show that the numbers below are rational and write each as a fraction:

ikadub [295]

Answer:

a) The number is:

0.73652913

There are 8 digits after the decimal point, then we need to multiply and divide by: 100,000,000 (8 zeros at the right of the 1)

0.73652913 = 0.73652913*(100,000,000)/(100,000,000) = 73,652,913/100,000,000

So we wrote this as a fraction of two integers.

b) The number is:

0.746746...

Where the periodic part is 746.

the periodic part has 3 digits, then we can do:

0.746746...*1000 = 746.746746....

Now we can subtract the number itself to get:

746.746746... - 0.746746... = 746

And what we did is:

N*1000 - N = N*999

Then to transform the number into a quotient of integers, we can multiply and divide by 999.

0.746746... = 0.746746...*(999)/(999) = 746/999

That is a quotient of two integers, so 0.746746... is a rational number.

4 0

2 years ago

Add (2x^2 - 2x) + (6x - 4)

Vesnalui [34]

Answer:

2x^2 +4x -4

Step-by-step explanation:

(2x^2 - 2x) + (6x - 4)

Combine like terms

2x^2 +6x-2x -4

2x^2 +4x -4

7 0

3 years ago

Can you help me on unmber 2 or 3 Plzz show work

NikAS [45]

Step-by-step explanation:

In,

Question 2 I have already answered,

Q. 3)

<h3>Given Question:</h3>

$\frac{ {c}^{2} }{d}$

Given values:-

c = 6 , d = 3

By putting the values in the question, 

$\frac{ {6}^{2} }{3}$

$= \frac{36}{3}$

= 12 (Ans)

3 0

2 years ago