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HACTEHA [7]
3 years ago
11

In the last year,a total of 14,905 earthquakes occurred in a country. Of these,88.8% were minor tremors with magnitude of 4.9 or

less on the Richter scale. How many minor earthquakes occurred in the country in the last year?
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
4 0

Answer:

<em>13,236 minor earthquakes occurred </em>

Step-by-step explanation:

\frac{Part}{Total}

"x" part amount of earthquakes

14,905 total amount of earthquakes

88.8 % part percentage of earthquakes

100% total percentage of earthquakes

\frac{x}{14905} = \frac{88.8}{100}

x = 14,905 × \frac{88.8}{100}

x = 14,905 × 0.888 = 13,235.64 ≈ <em>13,236 minor earthquakes occurred</em>

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Maggie constructs a triangle with sides lengths 7 centimeters long and 10 centimeters long.
MakcuM [25]

7 centimeters is a possible length for the third side ⇒ B

Step-by-step explanation:

Let us revise the triangle Inequality Theorem

  • The sum of the lengths of any 2 sides of a triangle must be greater than the length of the third side
  • To prove that by easy way add the smallest two sides, if their sum greater than the third side,then the sides can form a triangle

Assume that the length of the third side is x cm

∵ The length of two sides are 7 cm and 10 cm

∵ The length of the third side is x cm

- Put the sum of x and 7 greater than 10 ( x and 7 are the smallest sides)

∴ x + 7 > 10

- Subtract 7 from both sides

∴ x > 3

- Put the sum of 7 and 10 greater than x (7 and 10 are the smallest sides)

∵ 7 + 10 > x

∴ 17 > x

∴ x < 17

- By using one inequality for x (combined the two inequalities in one)

∴ 3 < x < 17

That means the length of the third side is any number between 3 and 17

There is only one answer between 3 and 17

∵ 7 is between 3 and 17

∴ The length of the third side could be 7 cm

7 centimeters is a possible length for the third side

Learn more:

You can learn more about triangles in brainly.com/question/4599754

#LearnwithBrainly

7 0
3 years ago
2 1/4 -1 3/5 divided by 3
sveta [45]

Answer:

1.717

Step-by-step explanation:

3 0
3 years ago
Solve for x. whats the solutions from least to greatest. 4x^2 + 48x + 128 = 0
Anastasy [175]

Answer:

\boxed{\sf \ \ \ x = -8 \ or \ x = -4 \ \ \ }

Step-by-step explanation:

Hello,

4x^2+48x+128=0\\ 4(x^2+12x+32)=0\\ x^2+12x+32=0\\ (x+6)^2 - 36 + 32= 0\\\\ (x+6)^2-4=0\\ (x+6+2)(x+6-2)=0\\ (x+8)(x+4) = 0\\ x = -8 \ or \ x = -4

5 0
4 years ago
Write the integers -7, 4, -2 and 5 in order from least to greatest. Explain how you decided.
Dafna11 [192]

Answer:

-7, -2, 4, 5

Step-by-step explanation:

Integers with a dash in the front of them signify a negative. With negative numbers, the higher the value of the accompanying number, the lower value it has as a negative number, so, of course the negative integers would go from the "least" end of the spectrum. Because 7 has a higher positive value than 2, it has a lower negative value, putting -7 on the lower end, following it with the -2. As 5 has a higher positive value than 4, 5 is put on the highest end on the spectrum, with 4 right behind it. With all of these integers settled, we can organize the numbers in the order of -7, then -2, then 4, then 5.

6 0
3 years ago
Read 2 more answers
Solve for x.
Crank

The solutions to the given absolute value equation are:

x = −74 and x = 80

<h3>How to solve the given equation for x?</h3>

Here we want to solve the absolute value equation:

(1/7)*|x - 3| - 2 = 9

To solve this, we first need to isolate the absolute value part, so we get:

(1/7)*|x - 3| - 2 = 9

(1/7)*|x - 3| = 9 + 2

(1/7)*|x - 3| = 11

|x - 3| = 11*7

|x - 3| = 77

Now we can decompose the absolute value equation into two simpler ones, which are:

x - 3 = 77

x - 3 = -77

Solving those two equations we get:

x = 77 + 3 = 80

x = -77 + 3 = -74

Thus the solutions are:

x = -74 and x = 80, we conclude that the correct option is the last one.

If you want to learn more about absolute value equations:

brainly.com/question/5012769

#SPJ1

6 0
2 years ago
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