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mrs_skeptik [129]
3 years ago
12

Every 100 tons of the earth's crust contain about 28 tons of silicon. What is the ratio of the weight of silicon to the weight o

f crust? of the weight if crust to the weight of silicon?
Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
4 0
<h3>Answer:</h3>
  1. 28/100 = 7/25
  2. 100/28 = 25/7
<h3>Explanation:</h3>

The wording "the ratio of A to B" means A/B.

Here, "the ratio of the weight of silicon to the weight of crust" means ...

... (28 tons)/(100 tons)

Canceling common factors (and common units), this is ...

... 28/100 = 7/25

___

Then "the ratio of the weight of crust to the weight of silicon" means ...

... (100 tons)/(28 tons) = 100/28 = 25/7

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Answer:

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Step-by-step explanation:

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Using the quadratic formula

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Substitute into the formula we have

CHECK THE ATTACHMENT

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Which is an equation in point-slope form for the given point and slope?
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Solution,

Point Slope Form: y - y1 = m(x - x1)

Now you have a reference equation of what the answer should look like.

By looking at the answer choices you can eliminate A.

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We can eliminate B because its not subtracting 3.

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4 0
3 years ago
In the expression 2m-5, which is the coefficient ?
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Juli2301 [7.4K]

Answer:

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Step-by-step explanation:

The unit rate means how much is one of the thing you are working with.  In this case, the unit rate of a pint (16 ounces) is how much just one ounce will cost.  So divide $3.93 by 16

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see explanation

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