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Bumek [7]
2 years ago
6

Kevin cut a plank a yard long. He painted 1/3 yard of the plank in black. How much of the plank is unpainted?

Mathematics
1 answer:
garik1379 [7]2 years ago
6 0

Answer: 2/3 yard

Step-by-step explanation: First, Kevin cut a plank a yard long. That means that he has a plank thats a yard long. Next, he painted 1/3 of the plank black. Before, 3/3 (basically equals to 1 yard long) of the plank was unpainted. So, the equation will be 3/3 - 1/3 which is equal to 2/3 yard.

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3rd option

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Here (h, k ) = (- 1, - 25 ) , then

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     = (x + 1)² - 25 ← expand using FOIL

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3 years ago
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3 years ago
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3 0
3 years ago
A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a spaceship th
SVETLANKA909090 [29]

The initial age of 10 years and the spaceship speed of 0.60•c, gives the Andrea's age at the end of the trip as 18 years.

<h3>How can Andrea's new age be calculated?</h3>

The time dilation using the Lorentz transformation formula is presented as follows;

t' =  \frac{t}{ \sqrt{1 -  \frac{ {v}^{2} }{ {c}^{2} } } }

From the question, we have;

The spaceship's speed, <em>v</em> = 0.6•c

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Therefore;

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Learn more about the Lorentz transformation formula here:

brainly.com/question/15544452

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3 0
2 years ago
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Ostrovityanka [42]
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3 years ago
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