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gayaneshka [121]
3 years ago
10

HELP!! TRIG LAW OF COSINES

Mathematics
1 answer:
vivado [14]3 years ago
4 0

Answer:

C ≈ 95.7°

Step-by-step explanation:

Law of cosines:

c² = a² + b² − 2ab cos C

where a, b, and c are the sides of the triangle, and C is the angle opposite of side c.

9² = 5² + 7² − 2(5)(7) cos C

81 = 25 + 49 − 70 cos C

81 = 25 + 49 − 70 cos C

7 = -70 cos C

-1/10 = cos C

C ≈ 95.7°

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maxonik [38]
Since 1/6 of the day was spent in the flower bed and 2/3 of that was spreading mulch, we need to find 2/3 of 1/6 to find out how much of the day was spreading the mulch.

In math "of" means times
"is" means equals

2/3 of 1/6 is
 
translates to

2/3 x 1/6 =

Now we just multiply the numerators across and denominators across then reduce if possible...

2/3 x 1/6 = 2/18

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7 0
3 years ago
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NARA [144]
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3 years ago
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3 0
3 years ago
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Simora [160]

Answer:

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Step-by-step explanation:

There are 147 containers that contain 5 gallons each.  We need to multiply to find the total number of gallons.

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6 0
4 years ago
Read 2 more answers
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Andrei [34K]

Answer:

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54:18

Step-by-step explanation:

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3:1

You can also multiply both sides by 2 to get another ratio:

27(2):9(2)

54:18

8 0
3 years ago
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