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morpeh [17]
3 years ago
12

The ratio of boys to girls in mr. Chens class is 4 to 5. Which of the following cannot be the total number of students in mr. Ch

ens class: 18,20,27, or 36
Mathematics
1 answer:
Rudiy273 years ago
8 0
It would be 20, because 5 plus 4 is 9 and you can multiply 9 by 2 to get 18, 9 by 3 to get 27, and 9 by 4 to get 36, but you can't multiply anything by 9 to get to 20.
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What equation describes the circle that is centered at (8, 3) and has a radius of 9
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Answer:

<h3> (x-8)²+(y-3)² = 81</h3>

Step-by-step explanation:

The general equation of a circle is expressed as;

(x-a)²+(y-b)² = r² where;

(a, b) is the centre of the circle

r is the radius

Given the centre (8, 3) and the radius of 9, the equation of the circle will be;

(x-a)²+(y-b)² = r²

(x-8)²+(y-3)² = 9²

(x-8)²+(y-3)² = 81

hence the required equation is  (x-8)²+(y-3)² = 81

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2 years ago
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Answer:

Step-by-step explanation:

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√(5/4)= √5/ √4 =√5/2 = (1/2)√5

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3 years ago
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Mariana [72]

Answer:

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7 0
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