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svetoff [14.1K]
3 years ago
7

A meteorite is a solid piece of debris from an asteroid or comet that traveled from outer space to reach Earth's surface. There,

it turns a rusty, reddish-brown color over time. Based on this information, which of the following can be concluded about the physical composition of the asteroid or comet that this meteorite came from? A It contains gold. B It contains glass. C It contains sand. D It contains iron plzzz helppppp
Mathematics
2 answers:
djverab [1.8K]3 years ago
7 0

Answer:

D

Step-by-step explanation:

When iron reacts with air and water, it forms Iron (III) oxide, also known as rust, which is reddish-brown.

Dafna11 [192]3 years ago
4 0

Answer: D

--

Hope this helps

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9. An article was sold at a profit of 12%. Had it been sold for Nu 80 more, there would be a profit of
Kamila [148]

Answer:

<em>The cost price of the article was Nu 1,000</em>

<em>The original selling price was Nu 1,120</em>

<em>The second selling price was Nu 1,200</em>

Step-by-step explanation:

<u>System of Equations</u>

Let's call:

x = Original selling price of the article

y = Cost of the article

The first condition implies that the difference between the selling price and the cost price (the profit) is 12%. Recall the profit % is always calculated with respect to the cost, that is, the profit at the first condition is:

0.12y = Original profit

Setting up the equation, we have:

x-y=0.12y

The second condition states the selling price is 80 Nu more than before, that is:

x+80= Second selling price of the article

y = Cost of the article (it doesn't change)

The profit of this condition is 20%, thus:

0.2y = Second profit

This produces a second equation:

x+80-y=0.2y

Let's put both equations together to form a system of equations:

x-y=0.12y

x+80-y=0.2y

Operating on both equations:

x=1.12y

x=1.2y-80

Equating both equations, we have an equation with only y's:

1.12y=1.2y-80

Subtracting 1.2y on each side:

1.12y-1.2y=-80

Operating:

-0.08y=-80

Solving:

\displaystyle y=\frac{-80}{-0.08}=1,000

a)

The cost price of the article was Nu 1,000

b) The selling price of the article will be calculated in both cases:

Original selling price: x=1.12y= 1.12*1000=1,120

The original selling price was Nu 1,120

The second selling price was x+80=1,200

The second selling price was Nu 1,200

8 0
3 years ago
Is the fraction 1/3 equivalent to a terminating decimal or a decimal that does not terminate?
bezimeni [28]
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Please help me with this question.
Vesna [10]

Answer:

C

Step-by-step explanation:

C, because the second line keeps adding 6 to it and, the third line keeps adding 7.

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2 years ago
Evan wants to make a kneeling pad cushion for when he gardens for long periods of time. It will have the dimensions shown. How m
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Question

Even wants to make a kneeling pad cushion for when he gardens for long periods of time. How much fabric should he buy to cover the cushion?​

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Step-by-step explanation:

I just did this question on my assignment on Edge 2021

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Select one of the factors of the quadratic expression.
masha68 [24]

Answer:

A) (x + 2)


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