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Mars2501 [29]
3 years ago
9

Is -7/9 rational or irrational?

Mathematics
2 answers:
RideAnS [48]3 years ago
8 0

Answer:

It is a rational.

Step-by-step explanation:

Rational is any number that can be written in a form of <em>f</em><em>r</em><em>a</em><em>c</em><em>t</em><em>i</em><em>o</em><em>n</em>.

katrin [286]3 years ago
4 0

Answer:

yes it is rational

Step-by-step explanation:

because irrational numbers can't be written as a fraction but rational numbers can

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The scale of a map is 1:50000. A lake on the map is 6.16cm². find the actual area of the lake in hectares.
Mamont248 [21]

Answer:

1.54 [km²].

Step-by-step explanation:

1) the given scale is for linear functions, the given area of the lake is quadratic function. According to this

2) actual area = given area *50000 *50000;

3) the given area=0.000616 [m²],

the actual area=0.000616*50000*50000=1540000 [m²] or 1.54 [km²].

6 0
3 years ago
What is the following product ?
AfilCa [17]

Answer:

The correct answer is option B). 7x² -12x√14 + 72

Step-by-step explanation:

I<u>dentity</u>

(a - b)² = a² - 2ab + b²

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It is given that ( x√7 - 3√8)(x√7 - 3√8)

(x√7 - 3√8)(x√7 - 3√8) =  (x√7 - 3√8)²

(x√7 - 3√8)² =  (x√7)² - 2*x√7*3√8 +(3√8)²

 = 7x² - 6x√56 + 72

 = 7x² - 6x*2√14 + 72

 = 7x² - 12x√14 + 72

Therefore the correct answer is option B).  7x² - 12x√14 + 72

8 0
3 years ago
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Yuki888 [10]

Answer: b

Step-by-step explanation:

5 0
3 years ago
3x^3-5x+x^7+9+4x^11 polynomial
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Answer:

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hope this helps :)
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3 years ago
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