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2 years ago

Simplify the expression. If not possible, write simplified. 3 - 2y +9

Mathematics

2 answers:

Len [333]2 years ago

8 0

Answer:

-2y + 12

Step-by-step explanation:

1) Group like terms: -2y + 3 + 9

2) Combine like terms: 3 + 9 = 12

3) -2y + 12

Hope this helps and good luck with your assignment. (pleasem mark me brainliest if possible)

svlad2 [7]2 years ago

6 0

Answer:

-2y + 12

Step-by-step explanation:

3 - 2y +9

Combine the constants

-2y +3+9

-2y + 12

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a tight roll of paper, as delivered to the printer, is 60cm in diameter, and the paper is wound on to a wooden cylinder 8cm in d

Alekssandra [29.7K]

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The length of papers around the edge is 1607680 cm

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$\mathbf{d_1 = 60cm}$

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The area of the circle head is:

$\mathbf{Area = \pi \frac{d^2}{4}}$

So, we have:

$\mathbf{Area = \pi \frac{d_2^2 - d_1^2}{4}}$

Substitute known values

$\mathbf{Area = \pi \frac{68^2 - 60^2}{4}}$

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The length of the paper is then calculated as:

$\mathbf{Length = \frac{Area}{0.0005}}$

This gives

$\mathbf{Length = \frac{256\pi}{0.0005}}$

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$\mathbf{Length = 1607680}$

Hence, the length of papers around the edge is 1607680 cm