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Eva8 [605]
3 years ago
8

Pls help me get full marks

Mathematics
2 answers:
soldier1979 [14.2K]3 years ago
7 0

Answer:

A is smaller

Step-by-step explanation:

Container A

A = 2π·r·h + 2π·r²

= 2π·r(h + r)

r = d/2 = 54mm/2 = 27 mm

h = 4d = 4·54mm = 216 mm

= 2·3.14·27(216 + 27)

= 169.56×243

= 41203.08 mm²

Container B

A = 4·l·h + 2·l²

l = 2d = 2·54mm = 108 mm

h = d = 54 mm

= 4·108·54 + 2·11664

= 23328 + 23328

= 46656 mm²

wlad13 [49]3 years ago
5 0

Answer:

A is smaller

Step-by-step explanation:

Radius = 54/2 = 27

Cylinder:

SA = 2×3.15×27² + 2(3.14×27×(4×54))

= 41203.08 mm²

Cuboid:

SA = 2[(2×54)²] + 4[54×(2×54)]

= 46656 mm²

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Lapatulllka [165]

Answer:

Q1. x = 10

Q2. x = 7

Step-by-step explanation:

The steps are :

Q1.

5x - 6 = 3x + 14

5x - 3x = 14 + 6

2x = 20

x = 20 \div 2

x = 10

Q2.

6x - 11 = 4x + 3

6x - 4x = 3 + 11

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3 years ago
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X^2 + x^2=6^2 what is x​
nikitadnepr [17]

Answer:

x = ±3 sqrt(2)

Step-by-step explanation:

x^2 + x^2=6^2

Combine like terms

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Take the square root of each side

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Remember that sqrt(a/b) = ±sqrt(a ) /sqrt(b)

x = ±sqrt(6^2)/sqrt(2)

x = ±6 /sqrt(2)

We do not leave square roots in the denominator, so we multiply the top and bottom by sqrt(2)

x = ±6 /sqrt(2) * sqrt(2)/ sqrt(2)

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x =  ±6 sqrt(2) /(2)

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andreyandreev [35.5K]

Answer:

7x+12

Step-by-step explanation:

7 0
3 years ago
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There are 30 students in the class. Eighteen of those students are girls. What percentage of the class is girls?
konstantin123 [22]

Answer:

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Convert fraction (ratio) 18 / 30

it's basically 18 divided by 30

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3 years ago
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7
Valentin [98]

9514 1404 393

Answer:

  A.  -1 ≤ x ≤ 3

Step-by-step explanation:

The range is the horizontal extent of the graph--the set of x-values for which the function is defined. Here, the graph extends from x = -1 to x = 3, with both end points included. The range is ...

  -1 ≤ x ≤ 3

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3 years ago
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