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3 years ago

Explain how science can help people save resources such as coal

2 answers:

6 0

If we develop energy sources which do not use coal, using scientific research, our reliance on coal is diminished; for if we have a technology that doesn't use coal, we don't need to use coal.

lana [24]3 years ago

5 0

They Can recycle it and reuse things so they won't waste instead of just throwing things away

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Simplify 2√2-√3<br> ---------------<br> √2+√3

serious [3.7K]

Step-by-step explanation:

$= \frac{2 \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} }$

$= \frac{2 \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} } \times \frac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} - \sqrt{3} }$

$= \frac{ 2( \sqrt{2} - \sqrt{3} )( \sqrt{2} - \sqrt{3} )}{ { \sqrt{2} }^{2} - { \sqrt{3} }^{2} }$

$= \frac{2(2 - \sqrt{6} - \sqrt{6} - 3) }{2 - 3}$

$= \frac{2( - 1 - 2 \sqrt{6} )}{ - 1}$

$= \frac{ - 2(1 + 2 \sqrt{6} )}{ - 1}$

$= 2(1 + 2 \sqrt{6} )$

$= 2 + 4 \sqrt{6}$

6 0

1 year ago

4x−2y=14 y=12x−1 solve by substitution

Tatiana [17]

Answer:

x= -3/5

Step-by-step explanation:

4x-2y=14

y=12x-1

4x-2(12x-1)=14

4x-24x+2=14

4x-24x=12

-20x=12

×= -12/20

x= -3/5

8 0

3 years ago

A bag of marbles contains 3 blue, 4 green, and 3 red marbles. If you take out 2 marbles, what is the probability that they are b

tangare [24]

4/10. *. 3/9. = 12/90 = 2/15

3 0

3 years ago

Find the area of a square with side lengths of 2/5 inch

bulgar [2K]

The area of the square would be 4/25 here is the work:

Area of an 2d shape: length * width

For a square it is 2/5 * 2/5

You multiply the two numbers and you should get 4/25.

If helped mark me the brainiest!!

4 0

3 years ago

What is 5/6 of 3/4 ?

goldenfox [79]

Answer:

Exact Form: 5/8

Decimal form: 0.625

Hope this helps

3 0

2 years ago