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Lisa [10]
2 years ago
14

I need help please this is due at 8

Mathematics
2 answers:
Lady bird [3.3K]2 years ago
8 0

Answer:

use \: this \: formula \\ circumference = dimeter \times 3.14 = 2 \times radius \times 3.14 \\  \\ area = 0.25 \times  {diameter}^{2}  \times 3.14 =  {radius}^{2}  \times 3.14

Daniel [21]2 years ago
6 0
I think I can’t help you but
Did you write the black text because it makes no sense you put the equitation and then the other the next box
The formula for circumference is pi diameter as seen below.
And then you find area by doing 3.14 times radius^2

Here is the answers for circumference going across
43.96, 69.08, 40.82, 28.26, 57.78

Next is area going across
153.86, 379.94, 132.67, 63.59, 265.77

Let me give you an example of how I did those
The ones with half a line are radius and diameter would be times 2 that
In order to find circumference, for the second one I did 11 times 2 (22) and then 22 times 3.14 (pi)
And for the area I did the radius already given
3.14 times 11^2
You have to square the radius and times it by pi
On the other questions if diameter, the whole line across the circle, is given then divide it by 2 to get radius.
Hope that helps!
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Multiply (9x+2y)(9x-2y)
Gala2k [10]

Hi there!

Here are all the steps into multiplying these 2 parentheses :

(9x + 2y) × (9x - 2y)

9x × 9x = <u>81x²</u>

9x × -2y = <u>-18xy</u>

2y × 9x = <u>18xy</u>

2y × -2y = <u>-4y²</u>


81x² - 18xy + 18xy - 4y²


-18xy + 18xy = 0


Your answer is: 81x² - 4y²


There you go! I really hope this helped, if there's anything just let me know! :)

6 0
2 years ago
Read 2 more answers
What's...factorise: 25x²-y²?
Bogdan [553]
Factorising an equation is putting it into bracket form.
This has square numbers and so needs double brackets

(5x - y) (5x+y)
If you then check this by multiplying the brackets out again you will get:
 5x^2 - 5xy + 5xy - y^2

The positive and negative 5xy's cancel each other out and you are left with its original form. Your answer is
(<span>5x - y) (5x+y)</span>
6 0
3 years ago
Henry has 600 pokemon cards, he wants to sell them all for 100 dollars total, how much would it be for each pokemon card
LUCKY_DIMON [66]

Let's begin by listing out the information given to us:

number of cards = 600

Sale price = $100

Each pokemon card is worth:

\begin{gathered} \frac{\text{Sale Price}}{Number\text{ of cards}}=\frac{100}{600}=0.167 \\ =0.17=17cents \end{gathered}

Each pokemon cards would sell for 17 cents each

7 0
1 year ago
Enter the degree of the polynomial below.
GREYUIT [131]

Answer:

B

Step-by-step explanation:

it goes from the 7th power to the 4th power. So add them together and you get 11

8 0
3 years ago
Have a look of the drawing... What is "d" value? I have tried many methods but don't find how to solve... Pleaseeee
Phoenix [80]
I´d say "d" is the distance from the eye to the wall. 
Now substracting 1.2-1 you´ll get the distance of the wall of the smallest triangle = 0.2 And you do 1.5-0.2= 0.3 that´s the distance of the wall of the other triangle. Then you solve everything with Pitagoras theorem. You have 2 rectangle triangles.
B+alfa=45°
tan^-1(0.2/d)=B
tan^-1(1.3/d)=alfa
THEN:
tan^-1(0.2/d)+tan^-1(1.3/d)=45°
 Now you have 3 ecs and 3 variables.
alfa,B and "d"

3 0
3 years ago
Read 2 more answers
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