3 years ago

Which expression is equivalent to the given expression?

Mathematics

1 answer:

Vladimir [108]3 years ago

7 0

B. 2x-2+3x is the correct answer

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The base of the triangle decreases by 30% and the height increases by 20%.

sergeinik [125]

Answer:

Area decreases by 16%

Step-by-step explanation:

Use formula for the area of the triangle

$A=\dfrac{1}{2}\cdot \text{Base}\cdot \text{Height}$

<u>Initial triangle:</u>

The base is 18 cm

The height is 5 cm

The area is

$A_{initial}=\dfrac{1}{2}\cdot 18\cdot 5=45\ cm^2$

<u>New triangle:</u>

The base is $(1-0.3)\cdot 18=0.7\cdot 18=12.6\ cm$

The height is $(1+0.2)\cdot 5=1.2\cdot 5=6\ cm$

The area is

$A_{new}=\dfrac{1}{2}\cdot 12.6\cdot 6=37.8\ cm^2$

Area decreases by

$100\%-\dfrac{37.8}{45}\cdot 100\%=100\%-84\%=16\%$

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3 years ago

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dangina [55]

The probability is 8:12

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Arisa [49]

It should be C., is that what the graph looks like?

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rewona [7]

Step-by-step explanation:

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Rotate -4,3 90 degrees counter clockwise

Delicious77 [7]

The answer would be (4,3)

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