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3 years ago

to meet increased demand, world food production must rise 50% by 2030. write this percentage as a fraction in simplest form.

Mathematics

1 answer:

Leya [2.2K]3 years ago

4 0

It would be 1/2 because that is the fraction of 50%

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What is the mean of 2,0,1,0,4,3,1,0,7

vitfil [10]

Answer:

2 is the mean

hope this helps

have a good day :)

Step-by-step explanation:

18 is the answer you get when you add all them together, then you are going to divide 9 because that is the # of them for the being to get the final answer of 2.

8 0

3 years ago

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What is the common ratio of the sequence 1, 4, 16, 64...... 1/3 4 3 1/4

34kurt

Answer:

Explanation:

1, 4, 16, 64......

mutiply all of the numbers by 4

1*4=4

4*4= 16

16*4= 64

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3 years ago

How many lines of symmetry does the figure below appear to have

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3 years ago

PROVE THAT: cos 20° - sin 20° = \sqrt{2}sin25°

Lemur [1.5K]

Answer:

See below.

Step-by-step explanation:

$\cos(20)-\sin(20)=\sqrt{2}\sin(25)$

First, use the co-function identity:

$\sin(90-x)=\cos(x)$

We can turn the second term into cosine:

$\sin(20)=\sin(90-70)=\cos(70)$

Substitute:

$\cos(20)-\cos(70)=\sqrt{2}\sin(25)$

Now, use the sum to product formulas. We will use the following:

$\cos(x)-\cos(y)=-2\sin(\frac{x+y}{2})\sin(\frac{x-y}{2})$

Substitute:

$\cos(20)-\cos(70)=-2\sin(\frac{20+70}{2})\sin(\frac{20-70}{2})\\\cos(20)-\cos(70) =-2\sin(45)\sin(-25)\\\cos(20)-\cos(70)=-2(\frac{\sqrt{2}}{2})\sin(-25)\\ \cos(20)-\cos(70)=-\sqrt{2}\sin(-25)$