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masya89 [10]
2 years ago
6

Three tenths of a number is 2.1 . Determine the number

Mathematics
2 answers:
Shkiper50 [21]2 years ago
7 0

3/10 N = 2.1

MULTIPLY  by 10/3 to each side

10/3 * 3/10  n = 2.1 * 10 /3

n = 2.1 * 10/3

n = 21/3

n =7

Ronch [10]2 years ago
3 0

Answer:

The number is 7.

Step-by-step explanation:

Let the number be x.

Three tenths of a number is 2.1 .

Mathematically we can denote this as:

\frac{3}{10}\times x=2.1

Now solving for x, we have ;

3x=2.1\times10

3x=21

Dividing both sides by 3;

x = 7

Hence, the number is 7.

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Answer:

Karson's average speed on his way home was 28 miles per hour.

Step-by-step explanation:

Since Karson drove from his house to work at an average speed of 35 miles per hour, and the drive took him 20 minutes, if the drive took him 25 minutes and he used the same route in reverse, to determine what was his average speed going home, the following calculation must be performed:

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The green goober a wildly unpopular hero mixes 3 L of yellow paint was 5 L of blue plate to make a leader is a special green pai
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Answer:

<u>The equation can be y = 3b/5 or b = 5y/3</u>

Correct statement and question:

The Green Goober, a wildly unpopular superhero, mixes 3 liters of yellow paint with 5 liters of blue paint to make 8 liters of special green paint for his costume.  

Write an equation that relates the amounts (in liters) of yellow paint (y) and blue paint (b) needed to make the Green Goober's special green paint.

Source:

Previous question that can be found at brainly

Step-by-step explanation:

Let y to be the amount of liters of yellow paint needed to make the Green Goober's special green paint.

Let b to be the amount of liters of blue paint needed to make the Green Goober's special green paint.

We know that:

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Both equations relate the amounts (in liters) of yellow paint and blue paint needed to make the Green Goober's special green paint.

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