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sveta [45]
3 years ago
14

Prove cos(x+y)+cos(x-y)=2cosxcosy

Mathematics
1 answer:
NISA [10]3 years ago
6 0
Work shown above! Hope ya understand!

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The length of the rectangle is twice its width. Write and solve a system of linear equations to find the length L and width W of
nignag [31]

Answer:

The length is equal to 12 and the width is equal to 6.

Step-by-step explanation:

In order to find the values here, we start by setting the width equal to x. Now knowing this, we know that the length is twice that long. Therefore, the length would be equal to 2x. Now we can use the perimeter formula to solve the equation.

2L + 2W = P

2(2x) + 2(x) = P

4x + 2x = 36

6x = 36

x = 6

Now with the given value for x, we can tell that the width is 6 and then we multiply it by 2 to get the length value (12).

6 0
3 years ago
Kori has 12 strawberries, 3 pineapples, and 4 kiwis. What is the ratio of strawberries to total fruit?
Anettt [7]

Answer:

12:19

Step-by-step explanation:

To create a ratio, we compare a portion to a whole. In this case our portion is 12 strawberries. Our whole is the total fruit, so let's add up each fruit to find the total.

12 + 3 + 4 = 19

Now we have our portion (12) and our total (19).

Let's create a ratio.

12:19

This ratio cannot be simplified further, so that is your answer.

Hope this helps!

3 0
3 years ago
Read 2 more answers
PLEASE HELP!!!
Rasek [7]

Answer:

its b

Step-by-step explanation:

I hope this helped

3 0
3 years ago
Read 2 more answers
Evaluate 6 • 3 ÷ start root 9 end root – 1.<br> A. 2<br> B. 3<br> C. 5<br> D. 6
Alborosie

6 * 3 / sqrt9

<em><u>Using PEMDAS, solve SQRT first.</u></em>

6 * 3 / 3

<em><u>Using PEMDAS, solve 6 * 3.</u></em>

18 / 3

<em><u>Solve.</u></em>

6.

Your answer is 6.

7 0
3 years ago
Read 2 more answers
What is the product of 7/8 and 2/7?
Kobotan [32]
The answer is 1/4 ;)
3 0
3 years ago
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