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Brums [2.3K]
3 years ago
14

I need help on the Wednesday column, question 1, letter b.

Mathematics
2 answers:
Margaret [11]3 years ago
7 0
AREA RELATED TO CIRCLES

Area of grass border = Area of bigger circle - area of smaller circle

Area \: of\: grass \: border \: = \:\pi {R}^{2} - \pi {r}^{2}

Area \: of \: grass \: border \: = \: \pi( {R}^{2} - {r}^{2} )

Area \: of\: grass \: border\: = \: \pi(R + r)(R - r) \\\\\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:= \: \:\frac{22}{7} (4 + 3)(4 - 3) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:= \frac{22}{7} \times 7 \times 1 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:= 22 \: \: {m}^{2} \: \: \: \: \: \: Ans.
labwork [276]3 years ago
4 0
Multiply 4 and 4.

4 x 4 = 16

Multiply 3.14 and 16.

3.14 x 16 = 50.24

Subtract 28.26 from 50.24.

50.24 - 28.26 = 21.98

Answer for Letter B = 21.98 m

Hope this helped!
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Can someone help me solve this? Pls and ty!
Zanzabum

Answer:

H. 95°

Step-by-step explanation:

m∠BGC is 10° smaller than m∠CGD, which means that m∠BGC is x° - 10°

m∠DGE is 25° more than m∠EGF, which means that m∠DGE is x° + 25°

The sum of all angles in a placement like this will always equal 360°

So we put all the measures of all angles on one side of thee equation and set it equal to 360*

x° + x° - 10° + 2x° + 25° + 2x° + 3x° + 30° = 360°

After combining like terms we get 9x° + 45° = 360°

After some algebra we get x = 35°

Now at the start we said that m∠DGE is x + 25°

Plug in 35° for x and we get 35° + 25°

The final answer is m∠DGE = 95°

Edit: Sorry if my answer looks a bit confusing. This is actually my first answer on Brainly so I'm quite new to this experience.

5 0
2 years ago
Read 2 more answers
If y = -5 when x = 2, find y when x = 8.
nasty-shy [4]

Answer:

Y= -20

Step-by-step explanation:

if y=-5 when x=2 find y when x=8

8 /2 = 4

=> x = 2 * 4 => x = 8 Answer

y = -5 * 4 =>

y= -20

4 0
2 years ago
• Use whichever method you prefer (the area model or the distributive property)
kolbaska11 [484]

Answer: 2a^2+22a+−1

Step-by-step explanation:

Let's simplify step-by-step.

2a^2−5a+(9)(3)a−1

=2a^2+−5a+27a+−1

Combine Like Terms:

=2a^2+−5a+27a+−1

=(2a^2)+(−5a+27a)+(−1)

=2a^2+22a+−1

4 0
3 years ago
What does a straight angle look like
Ksivusya [100]

Answer:

A straight angle is an angle of 180 degrees, so it looks like follows

4 0
1 year ago
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ASHLEY IS GOING ON A TRIP TO LONDON. SHE SAVED $100.00 IN SPENDING MONEY. WHEN SHE ARRIVES IN ENGLAND, SHE GOES TO A BANK TO CHA
Ilya [14]

Answer:

65.93

Step-by-step explanation:

Okay, first lets convert the money.

100 ÷ 1.43 = 69.9300699301 (69.93)

69.93 - 4 = 65.93

Ashley has 65.93 pounds.

Hope this helps! Brainliest would be appreciated. :)

4 0
3 years ago
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