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Kipish [7]
2 years ago
11

Plz answer my question

Mathematics
1 answer:
likoan [24]2 years ago
8 0

Step-by-step explanation:

a -  \frac{1}{a}  \\  \frac{ {a}^{2} - 1 }{a}  \\  =  \frac{ {(2 +  \sqrt{3} )}^{2}  - 1}{2 +  \sqrt{3} }  \\  = \frac{7 + 4 \sqrt{3} - 1 }{2 +  \sqrt{3} }  =  \frac{6 + 4 \sqrt{3} }{2 +  \sqrt{3} }  = 2 \sqrt{3}

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The covered part of this figure is a semicircle. What is the best approximation for the area of this figure?
zalisa [80]

Answer:

 94.18                            

Step-by-step explanation:

Given in the question a semi circle and a right angle triangle

Step 1

Find the diameter of the semi circle

To find the diameter we will use pythagorus theorem

<h3>hypotenuse² = height² + base²</h3>

here,

hypotenuse will be diameter of semicircle

height = 9

base = 4

Plug values in the formula above

diameter = √(9²+4²)

diameter = √97

Step 2

Find radius

<h3>radius = diameter / 2</h3>

Step 3

Area

<h3>π(r)²</h3>

π(√97/2)²

= 76.18

Step 4

Total surface area = area of circle + area of right angle triangle

                               = 76.18 + 1/2(9)(4)

                               = 94.18

6 0
2 years ago
Bob’s Bakery is counting the amount of pastries sold in 4 days. For the first 3 days, the bakery sold 147 pastries each day. On
Likurg_2 [28]

Answer:

579 pastries

Step-by-step explanation:

You can write an equation to solve this problem.

(3 * 147) + 138

(441) + 138 = 579

They sold 579 pastries in total.

5 0
2 years ago
Solve for the value of n.<br> please help
inysia [295]

Answer:

n = 8

Step-by-step explanation:

The angles are vertical angles and so they are equal

9n = 8n+8

Subtract 8n from each side

9n - 8n = 8n+8-8n

n = 8

3 0
2 years ago
I need help with this question
rewona [7]

Answer:

x=90-50

because the total angle is 90

3 0
2 years ago
Tom collects 20 crayons from his sister.
Klio2033 [76]

Answer:

5%

1 of the 20 crayons is red, so...

1/20 = 5% or 0.05

7 0
2 years ago
Read 2 more answers
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