3 years ago

Need help with question 2

Mathematics

1 answer:

Arlecino [84]3 years ago

7 0

Are u done? ..........

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In triangle ABC, a = 4, b = 6, and cos C = − 1/4. What is the length of side c?

shusha [124]

The length of side c would be 8.

Step-by-step explanation:

Given that,

a = 4

b = 6

cosC = -1/4

If we are given two sides and angle, the law of Cosines can be used to find the third side:

$c^{2} = a^{2} + b^{2} - 2ab (cos(c))$

By inserting the values in the formula, we get

$c^{2} = 4^{2} + 6^{2} - 2.4.6 (-\frac{1}{4} )$

$c^{2} = 16 + 36 + 12$

$c^{2} = 64$

$\sqrt{c^{2} } = \sqrt{64}$

c = 8.

Therefore, the length of side c would be 8.

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4 years ago

Paul owes Paula 35 cents and has a pocket full of 5-cent coins, 10-cent coins, and 25-cent coins that he can use to pay her. Wha

kykrilka [37]

So, what is the case in which he uses the least coins? can he use 1 coin? no, there isn't a 35 cent coin. can he use 2 coins? yes! he can use 25+10 cent coins!

now, the largest number of coins means the coins of the smallest value: so using only 5 cent coins. How many would this be?

we have to divide:

35/5=7

so we would use 7 coins.

And the difference is 5: 7-2 is 5.

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3 years ago

1. Find the GCF of 3x3y5z and 21xy3z4.

swat32

Answer:

GREATEST COMMON FACTOR IS 9XZ

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3 years ago

Compare the decimal by writing <,> or = on the space provided.

Svet_ta [14]

Answer:

1. < 2. < 3. > 4. = 5. >

Step-by-step explanation:

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3 years ago

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What lesson are you referring to

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