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Snowcat [4.5K]
3 years ago
8

A=2 b=2 c=1 Find the value of 2abcosC

Mathematics
1 answer:
mel-nik [20]3 years ago
6 0

Answer:

2abCosC = 1

Step-by-step explanation:

The cosine rule is

=> a^2= b^2+c^2-2abCosC

For 2abCosC, it becomes

=> 2abCosC = b^2+c^2-a^2

=> 2abCosC = (2)^2+(1)^2-(2)^2

=> 2abCosC = 1

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Can some on help me on this question?
mario62 [17]

Answer:

x=10 and x-7 is the answer

Step-by-step explanation:

a)2x-7=13

2x=13+7

2x=20

x=20/2

x=10

b)3x+4=25

3x=25-4

3x=21

x=21/3

x=7

i hope it will help you

6 0
3 years ago
Read 2 more answers
Carl, Gilda, Conroy, and Kyla are the four candidates in a school election. Carl received 1/5 of the votes, Gilda received 5% of
Juliette [100K]
Firstly, we can convert all of the fractions into percentages. To do this, we need to make the denominator of the fraction 100, and whatever we do to the denominator we must also do to the numerator.

5 x 20 = 100
1 x 20 = 20.

So Carl recieves 20/100 or 20% of the votes.

4 x 25 = 100
1 x 15 = 25

So Conroy receives 25/100 or 25% of the votes.

If we add these together and Gilda's 5%, we get 50%. Since there are 100% votes overall, we need to do 100 - 50 = 50.
 
Kyla receives 50% of the votes.
8 0
3 years ago
Read 2 more answers
For which interval is the function constant?
andreev551 [17]

Answer:

Option D (2, 6)

Step-by-step explanation:

As shown in the graph function has four intervals on which graph is plotted.

1). From the graph we can see in the interval -10 ≤ x ≤ 0 graph is increasing.

2). From 0 ≤ x ≤ 2 function is decreasing.

3). Between 2 ≤ x ≤ 6 function is constant.

4). And for x ≥ 6 function is increasing.

Therefore interval in which the function is constant is (2, 6).

4 0
3 years ago
A number minus 5 is between 2 and 8
vredina [299]

Answer:

either 7 or 8 but, 8 is most likely.

start with the numbers in the set 2,3,4,5,6,7,8

its supposed to be between 2 and 8

the only number that would work is 7 and 8 if you use 7 you get 2 and if you use 8 you get 3

5 0
3 years ago
Read 2 more answers
12(2 - x) + 2 = 14 (12(2-x) + 2 =14
nata0808 [166]

Answer:

x = 1

Step-by-step explanation:

12(2 - x) + 2 = 14

24 - 12x + 2 = 14

26 - 12x = 14

-12x = -12

x = 1

Hopefully this helps!

Brainliest please?

4 0
3 years ago
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