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3 years ago

Can I please get help on these and thanks!!!!

Mathematics

2 answers:

GuDViN [60]3 years ago

7 0

Question 4:

A.) Documentation Files (Field Reports)

Explanation:

Archaeologists record their findings in documentation files or field reports because that would be the more formal and official to jot down important information.

Question 5:

B.) Information Collection and Review

Explanation:

Archaeologists verify existing archaeological records through the information collection and review stage. This one was a tricky question, because it's asking about <em>existing </em>records, not newly found records.

Hope this helps ya :D

stiv31 [10]3 years ago

4 0

Answer:

Step-by-step explanation:

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777dan777 [17]

I think it is 5 11/24

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3 years ago

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In Mr.Martinez's sixth period class, there are 8 boys and 12 girls. what is the probability of randomly selecting a girl?

Murljashka [212]

The probability of choosing a girl is 12/20

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4 years ago

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The ordered pair (1, -5) is a solution for the system x + 2y = -9 and x - y = 6.<br> true <br> false

sweet [91]

In an ordered pair, x is the first number and y is the second number. So this is telling you x=1 and y=-5. You can take this information and plug it into the formulas.

x + 2y = -9
1 + 2(-5) = -9
1 + -10 = -9? True

x - y = 6
1 - -5 = 6? *
1 + 5 = 6? True.

(*Subtracting a negative makes it a positive.)

3 0

3 years ago

Hey i need help with number 8 and 9 thanks!

snow_lady [41]

Answer:

8 9.8 - 6.4n

9 15 - j/2

Step-by-step explanation:

2.8 - 4.4n - 2n +7

= 2.8+7 -4.4n -2n

= 9.8 - 6.4n

11 + (-3) - 1/8 j - 3/8 j +7

= 11 - 3 - 1/8 j - 3/8 j + 7

= 11 - 3 + 7 - 1/8 j - 3/8 j

= 15 - 4/8 j

= 15 - j/2

5 0

3 years ago

c.) The sonar of a navy cruiser detects a submarine that is 4000 feet from the cruiser. The angle between the water line and the

Kamila [148]

Answer:

2236.77 feets

Step-by-step explanation:

From the attached picture, we are to find x, which is the vertical depth of the submarine.

Using trigonometry based on the illustration in the diagram:

Sinθ = opposite / hypotenus

Sinθ = x (depth of submarine) / distance from ship (4000)

Hence,

Sinθ = x / 4000

θ = 34°

Sin34 = x / 4000

0.5591929 * 4000 = x

2236.7716 = x

Hence, depth of submarine = 2236.77 feets

7 0

3 years ago