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Amiraneli [1.4K]
3 years ago
15

The difference between seven times a number and 9 is equal to three times the sum of the number and 2. Find the number

Mathematics
1 answer:
murzikaleks [220]3 years ago
8 0

Answer:

Number:3.75

Equation:7 x-9=3(x+2)

Step-by-step explanation:

Let the number be x.

According to the question,

7 x-9=3(x+2)

7 x-9= 3 x+ 6

7 x- 3 x= 9+6

4 x= 15

x=15/4

x=3.75

If you verify the answer you will get,

11.25=11.25

Thank you!

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Restrict the domain of the quadratic function and find its inverse. Confirm the inverse relationship using composition. f(x) = 0
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The given function is

f(x)= 0.2 x²

Since f(x) will be defined for all real values of x.

So, Domain of f(x) will be ( x| x is a real number.)→This is set builder notation.

Finding the inverse of f(x):

y = 0.2 x²

→ x²= 5 y

→x = \pm\sqrt{5 y}→ → Inverse of f(x)

Replacing x by y and y by x,we get inverse of the given function

y = \pm\sqrt{5 x}→ →Domain x ≥ 0, x∈[0,∞]

Graph of function and its inverse are shown below.

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3 years ago
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Step-by-step explanation:

Given,

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The amount of bill is $43.15

Keywords: subtraction, multiplication

Learn more about subtraction at:

  • brainly.com/question/11175936
  • brainly.com/question/11203617

#LearnwithBrainly

8 0
3 years ago
Which set of side lengths is a pythagorean triple
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Several examples of side lengths that are Pythagorean triples are the following with the corresponding side lengths A, B, C:

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3 years ago
Can someone please help me
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Answer:

The answer is B)

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7 0
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BartSMP [9]
The answer is A because 5 x 3/8 and 15 x 1/8 both equal 15/8. 
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