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RUDIKE [14]
3 years ago
7

Models can be helpful in scientific investigations because

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
6 0

Answer:

the answer is d

Step-by-step explanation:

ELEN [110]3 years ago
5 0

Answer:

a

Step-by-step explanation:

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Solve this problem???​
Svetllana [295]

The denominator of the first term is a difference of squares, such that

4<em>a</em> ² - <em>b</em> ² = (2<em>a</em>)² - <em>b</em> ² = (2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)

So you can write the fractions as

(4<em>a</em> ² + <em>b</em> ²)/((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)) - (2<em>a</em> - <em>b</em>)/(2<em>a</em> + <em>b</em>)

Multiply through the second fraction by 2<em>a</em> - <em>b</em> to get a common denominator:

(4<em>a</em> ² + <em>b</em> ²)/((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)) - (2<em>a</em> - <em>b</em>)²/((2<em>a</em> + <em>b</em>) (2<em>a</em> - <em>b</em>))

((4<em>a</em> ² + <em>b</em> ²) - (2<em>a</em> - <em>b</em>)²) / ((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>))

Expand the numerator:

(4<em>a</em> ² + <em>b</em> ²) - (2<em>a</em> - <em>b</em>)²

(4<em>a</em> ² + <em>b</em> ²) - (4<em>a</em> ² - 4<em>ab</em> + <em>b</em> ²)

4<em>ab</em>

<em />

So the original expression reduces to

4<em>ab</em> / ((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>))

or

4<em>ab</em> / (4<em>a</em> ² - <em>b</em> ²)

upon condensing the denominator again.

8 0
3 years ago
Lucy had 24 beanbags and gave 1/3 of them to her friend Shelley. How many beanbags does Lucy have left?
Fantom [35]
Answer:8


1/3 divided by 24 equals 8.
6 0
3 years ago
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Find the area of the bedroom with the shape shown in the figure, in square feet.
maksim [4K]

I think the answer is C

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For the equation a(x+2)=-3x+b, if a=1 what value of b will make x=2
tiny-mole [99]

Answer:

10

Step-by-step explanation:

replace x with 2 and you will got the answer...

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The value of a particular antique is estimated to be £122000.
swat32
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