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solniwko [45]
4 years ago
6

Three times the difference between eighteen and thirteen

Mathematics
1 answer:
olchik [2.2K]4 years ago
8 0
3*(18-13)
3* 5
15

The answer is 15
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1.13-lab: temperature of soil and water
Schach [20]

Radiation from the sun heats the Earth's surface by means of rays that are trapped in the atmosphere and allow the Earth to have constant heat.

<h3>How is the Earth's surface heated?</h3>

The surface of the Earth heats up due to the sun's rays that hit it and when they enter the atmosphere they are reflected on the surface being trapped between the atmosphere and the surface.

Another important aspect to keep in mind is that the rays strike at different angles throughout the Earth, for example:

  • In the equatorial zone they affect directly, so this zone tends to be more quality than others in which the rotation and translation of the Earth cause the rays to enter in less or more quantity throughout the year.

Learn more about solar rays in: brainly.com/question/919704

5 0
2 years ago
Which of the following numbers is
Nezavi [6.7K]

Answer:

B

Step-by-step explanation:

1 million has 7 digits so that means 27million would have 8 digits and that eliminates C. having the word "three" in the question eliminates D and "three hundred and thirty thousand" means A is eliminated

4 0
3 years ago
Katherine Owes eight of her friends the same amount of money for total of $60
ArbitrLikvidat [17]

Answer:

7.50 per person

Step-by-step explanation:

60 divided by 8

7.5

7 0
4 years ago
the average annual income, /, in dollars, of a lawyer with an age of x years is modeled with with the following function: I=-425
krek1111 [17]

Answer:

26 years of age.

Step-by-step explanation:

The average annual income, I, in dollars, of a lawyer with an age of x years is modeled with with the following function:

I = - 425x² + 45500x - 650000 .......... (1)

If the average annual income of the lawyer at the age of x years is $250000, then from the equation (1) we can write

- 425x² + 45500x - 650000 = 250000

⇒ - 425x² + 45500x - 900000 = 0

⇒ - 17x² + 1820x - 36000 = 0

Now, using the quadratic formula,

x = \frac{- 1820 \pm \sqrt{(1820)^{2} - 4(-17)(- 36000) } }{2(- 17)} = \frac{-1820 + 929.73}{- 34} = 26 years (Approximate)

{We have neglected the other root as we need the youngest age}(Answer)

4 0
4 years ago
Which choice represents the expanded form of the expression, (x−2)^3?
schepotkina [342]

(x-2) ^3

x^3-6x^3+12x-8

5 0
3 years ago
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