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3 years ago

Simplify -2(4 – 5s + 12t – 2u)

Mathematics

1 answer:

g100num [7]3 years ago

5 0

Answer: -8+10s-24t+4u

Steps: Multiply the parantheses by -2

-2×4-2×(-5s)-2×12t-2×(-2u)

Multiply the numbers and calculate the product.

-8+10s-2×12t-2×(-2u) → -8+10s-24t-2×(-2u) → -8+10s-24t+2×2u

And you get -8+10s-24t+4u

Hope this helps ʕ•ᴥ•ʔ

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17. The length of a rectangle is 3 inches greater than its width. The perimeter is 28 inches.

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Answer:

$\boxed{ \bold{ \sf{ width \: of \: a \: rectangle = 5.5 \: inches}}}$

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Step-by-step explanation:

Let the width of a rectangle be 'w'

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To find : dimensions of the rectangle ( length and width )

Finding the width of a rectangle ( w ) 

$\boxed{ \sf{perimeter \: of \: a \: rectangle = 2(l + w)}}$

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$\dashrightarrow{ \sf{4w + 6 = 28}}$

$\dashrightarrow{ \sf{4w = 28 - 6}}$

$\dashrightarrow{ \sf{4w = 22}}$

$\dashrightarrow{ \sf{ \frac{4w}{4} = \frac{22}{4} }}$

$\dashrightarrow{ \sf{w = 5.5 \: inches}}$

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Now, replacing / substituting the value of w in order to find the length of a rectangle 

$\sf{ length = 3 + w}$

$\dashrightarrow{ \sf{length = 3 + 5.5}}$

$\dashrightarrow{ \sf{length = 8.5 \: \: inches}}$

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Hope I helped!

Best regards! :D

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3 years ago

Please help!!! Thanks!

Darina [25.2K]

8x+(4*30)=6(6+30)
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