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Alexus [3.1K]
4 years ago
8

Simplify the following expression: 18g+7-12g-3

Mathematics
2 answers:
leva [86]4 years ago
8 0
There u go
Please mark brainliest
:)

schepotkina [342]4 years ago
4 0

Answer:

18g + 7 - 12g - 3 = 6g + 4

Step-by-step explanation:

18g+7-12g-3\\=18g-12g+7-3\\=6g+7-3\\=6g+4

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makvit [3.9K]

Answer:

\large\boxed{B.\ a=8,\ b=4\sqrt5}

Step-by-step explanation:

We have three similar triangles:

\triangle ABC\sim\triangle DBA\sim\triangle DAC

therefore the sides are in proportion:

\dfrac{AD}{CD}=\dfrac{BD}{AD}

We have AD = a, CD = 16 and BD = 4. Substitute:

\dfrac{a}{16}=\dfrac{4}{a}              <em>cross multiply</em>

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and other proportion:

\dfrac{AB}{BC}=\dfrac{BD}{AB}

We have AB = b, BC = 16 + 4 = 20 and BD = 4. Substitute:

\dfrac{b}{20}=\dfrac{4}{b}             <em>cross multiply</em>

(b)(b)=(20)(4)\\\\b^2=80\to b=\sqrt{80}\\\\b=\sqrt{16\cdot5}\\\\b=\sqrt{16}\cdot\sqrt{5}\\\\b=4\sqrt{5}

3 0
3 years ago
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ivolga24 [154]

Answer:

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Step-by-step explanation:

Multiply your number by 100 to get the percentage.

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3 0
2 years ago
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Answer:

The answer is B

Step-by-step explanation:

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C) Is wrong because B is right

B) Ensures there is no negative distance

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