2 years ago

Find M A. 17 B. 16 C. 18 D. 20

Mathematics

1 answer:

mixas84 [53]2 years ago

7 0

Answer:

A. 17

Step-by-step explanation:

using the cosine rule (also see attached for reference):

AB² = BC² + AC² - 2·AC·BC cos C

2·AC·BC cos C = BC² + AC² - AB²

Given that AC = 18, AB = 12 and BC = 18, substituting these into the formula

2(18)(28) cos C = 28² + 18² - 12²

1008 cos C = 964

cos C = 964/1008

cos C = 0.9563

C = cos⁻¹ 0.9563

C = 16.99 ( = 17° rounded to nearest degree)

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3 years ago

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Andy wants to be able to do a 180 degree turn on his skateboard. He can now do a 120 degree turn. How many more degrees does he

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Step-by-step explanation:

Given

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3 years ago

3x−12≥15 2x−5≤9 5x+8≤53 3x−5≥16

zalisa [80]

Answer:

Step-by-step explanation:

A) 3x−12≥15

3x ≥ 15 + 12

3x ≥ 27

or x≥ 9

B) 2x−5≤9

2x ≤ 9 +5

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or x ≤ 7

C) 5x+8≤53

5x ≤ 53 -8

5x ≤ 45

or x ≤ 9

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3x ≥ 21

or x ≥ 7

Have a good day!

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3 years ago

What is vertical distance? is it addition or subtraction

eduard

The vertical distance between two things is

(the height of the top one) minus (the height of the bottom one) .

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The average weight of a mature human brain is approximately 1400 grams. what is the equivalent weight in kilometers? In pounds?

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