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Ganezh [65]
3 years ago
15

How can you understand porportions

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
4 0

A proportion is a statement that two ratios are equal.  A ratio is a comparison of two different quantities.  "Miles per hour" is a ratio.  "Dollars per pound" is a ratio.  A proportion is that two of these things are equal.

For example, paying $2/pound for apples is the same as paying $6 for 3 pounds:

   \dfrac{\$2}{1 \text{ pound}} = \dfrac{\$6}{3 \text{ pounds}}

That's a portion.

When working with proportions in word problems, you start by setting up one ratio/fraction where you know all the information.  You then set up the second one that's missing a piece of information, but you make sure to set it up using the same structure.

If your first ratio is "miles over hours," then the next ratio has to have the same organization.

If your first ratio is "rise over run," then the next ratio has to have the same organization.

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What is the simplified form of 4 X ? 3 + 7?
tia_tia [17]

Answer:

4x(10)

Step-by-step explanation:

add 3+7=10

4x is multiplying 3+7=10

4x(10)

6 0
3 years ago
B(n) = -1 (2)^n-1 What is the 5th term in the sequence?
bija089 [108]

Answer:

<h2>The answer is - 16</h2>

Step-by-step explanation:

<h3>b(n) =  - 1 ({2})^{n - 1}</h3>

where

n is the number of terms

From the question since we are finding the 5th term

n = 5

Substitute the value into the above formula and solve

We have

b(5) =  -  1({2})^{5 - 1}  \\  =  - 2 ^{4}

We have the final answer as

<h3>- 16</h3>

Hope this helps you

8 0
3 years ago
If 24 = 3 • 2× then x =
lidiya [134]

Answer:

4

Step-by-step explanation:

3x2=6

6 times what gives 24?

6x4=24

So x=4

7 0
3 years ago
PLs help 5 star rating and brainliest if anwsered correctly
True [87]

Answer:

Surface Area is 87.6cm squared

Step-by-step explanation:

5 0
2 years ago
A regular octagon rotates 360° about its center. How many times does the image of the octagon coincide with the preimage during
Anuta_ua [19.1K]
This regular polygon, having eight sides and 45º angle in similar parts, when rotating 360º, will find a similar image and a similar angle of 45º, therefore dividing the angle of 360º by 45º will be the Number of coincidences<span> in image.

</span><span>Solving, thus, we have:
</span>\frac{360}{45} = \boxed{\boxed{8\:coincidences\:in\:image}}\end{array}}\qquad\quad\checkmark<span>



</span>
4 0
3 years ago
Read 2 more answers
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