3 years ago

Any one please need help

Mathematics

1 answer:

fiasKO [112]3 years ago

6 0

The answer to the question is right

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Analyze the diagram below and complete the instructions that follow.

Trava [24]

Law of Cosines says

$b^2 = a^2 + c^2 - 2 ac \cos B$

$2 a c \cos B = a^2 + c^2 - b^2$

$\cos B = \dfrac{a^2 + c^2 - b^2}{2 a c}$

$\cos B = \dfrac{16^2 + 16^2 - 11^2}{2(16)(16)} = \dfrac{ 391}{512}$

$B = \arccos \dfrac{ 391}{512} \approx 40.2 ^\circ$

Choice C

5 0

2 years ago

I need some help on this question please

artcher [175]

Answer:

36, 32, 28, 24

Step-by-step explanation:

Fill in the values of n and do the arithmetic.

a1 = 36 -4(1 -1) = 36

a2 = 36 -4(2 -1) = 32

a3 = 36 -4(3 -1) = 28

a4 = 36 -4(4 -1) = 24

_____

You could recognize the formula as the specific case of the explicit formula for an arithmetic sequence with first term 36 and common difference -4. That tells you the second term is 36 -4 = 32, and each successive term is 4 less than the one before.

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3 years ago

a crew workers paved 2/15 mile in 20 minutes. if they work at the same rate what portion of a mile will they pave in one hour?

ANEK [815]

Since 20 min is 1/3 of a mile 20 min*3=1 hour. then u multiply 2/5 by 3 to get 6/5.

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3 years ago

31 cups are = to how many gallons

Pavel [41]

The answer is 1.9 gallons

6 0

2 years ago