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irina1246 [14]
3 years ago
9

Find the value of x in the given ratio 2x/21=12/18

Mathematics
2 answers:
Bess [88]3 years ago
8 0
2x/21=12/18
Use cross multiply
2x(18)=21×12
36x=252
Divided 36 for both side
36x/36=252/36
x=7. As a result, x=7 is your final answer. Hope it help!
zavuch27 [327]3 years ago
4 0
You can use something called crossed multiplication (not sure the official name but something like that) basically when you have 2 fractions that equal to each other, you can multiply the numerator on the left-hand side with the denominator on the friction on the right side. and repeat the same with the numerator on the right side and multiply it by the denominator on the left. that way, there will be no more fractions and will just leave you simple algebraic equations.
so in here2x / 21 = 12 / 18 252 = 36x x = 7
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Step-by-step explanation:

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Rani will use 3/2 cups of white rice for 3 cups of milk.

<h3>What is termed as unitary method?</h3>

"It is a method in which we obtain the value of a single unit by subtracting the value of multiple units and thus the value of multiple units by subtracting the value of a single unit."

  • The value of several things is given in the unitary method, and we must either figure out the significance of more or lesser things.
  • To do so, we must first determine the value of one item by division and then determine the value of ever more or fewer items by multiplication.

Now, for the given question;

1 cup of white rice is required for every 2 cups of milk by Rani.

Thus,

2 cups of milk ------> 1 cup of white rice.

So, using unitary method. Divide both side by 2.

1 cups of milk ------> 1/2 cup of white rice.

Now, calculate for the 3 cups of milk.

multiplying both side by 3.

3 cups of milk ------> 3/2 cup of white rice.

Therefore, the 3/2 cups of white rice required for the 3 cups of milk.

To know more about unitary method, here

brainly.com/question/28540270

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6 0
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Hatshy [7]

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Step-by-step explanation:

We know that the average rate of change over the interval x=0 to x=8 is:

(f(x2) - f(x1))/x2-x1

Where:

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so f(8)=3(8)+4 = 28

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Then: (f(x2) - f(x1))/x2-x1 = Then: 23 - 7/8-0 = 16/8 = 2

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3 years ago
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vladimir1956 [14]

Answer:

13/25 or 52%

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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