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velikii [3]
3 years ago
7

The law of cosines is a² + b² - 2abcosC = c². find the value of 2abcosC

Mathematics
2 answers:
taurus [48]3 years ago
7 0
\bf a^2+b^2-(2ab)cos(C)=c^2\implies a^2+b^2-c^2=(2ab)cos(C)
Elina [12.6K]3 years ago
3 0

Answer:

We need a diagram please

Step-by-step explanation:

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Some students were asked what kinds of animals they have at home.
Nataly_w [17]

(a) Animals by popularity; Dogs, Cats, Others, Horses.

(b) If 250 students were interviewed, 20 students have other pets.

(c) No, it was incorrect.

Step-by-step explanation:

Step 1; We arrange the different pets in chronological order, from the highest percent to the lowest percent;

1. Dogs - 67%,

2. Cats - 20%

3. Others - 8%,

4. Horses - 1%.

None is not included in this list.

Step 2; If 250 students were interviewed, 8% of those have other pets. So we need to calculate how much 8% of 250 is.

8% of 250 = \frac{8}{100} × 250 = 0.08 × 250 = 20.

So 20 students had other pets.

Step 3; 20% of the interviewed students had cats. If 75 students had cats, we need to equate 20% to the 75 and find out how many students were actually interviewed.

20% × x = 75, 0.2 × x = 75,

x = \frac{75}{0.2} = 375.

So if 375 students were interviewed, 75 students would have cats. So the estimate of 250 students being interviewed is incorrect.

8 0
3 years ago
of the students in ms. hillers class, 27% have blonde hair, 0.33 have black hair and 2/5 have brown hair. which hair color is mo
aleksandrvk [35]

Answer:

Brown hair is the most common

Step-by-step explanation: 0.33 as a percent is 33% and 2/5 as a percent is 40% and 40 is the most the 40% wins

6 0
2 years ago
How the hell you do them diamond problems
Black_prince [1.1K]
you are stupid hahaha
6 0
3 years ago
Read 2 more answers
Anna picked 6 apples. Sabrina picked 7 times as many apples. How many apples did Sabrina pick?
koban [17]

Anna picked 6 apples

Sabrina picked 7 <em>times</em> as many apples.

Multiply the two numbers together

6 x 7 = 42

Sabrina picked 42 apples

hope this helps

~<em>Rise Above the Ordinary</em>

6 0
3 years ago
Read 2 more answers
A relationship between a producer and consumer is best illustrated by
makvit [3.9K]

Answer:

A zebra eating grass

Step-by-step explanation:

Its a zebra eating grass because the zebra in consuming grass, which grass is a producer.

6 0
3 years ago
Read 2 more answers
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