2 years ago

In a class of 25 students, 15 of them have a cat,

Mathematics

1 answer:

igor_vitrenko [27]2 years ago

7 0

Answer: 9/25

Step-by-step explanation:

Since 3 of them have neither a cat or a dog, that means 22 (25-3) of them have a dog, a cat, or both.

16 + 15 = 31, which is 9 more than 22. That means 9 of them have both a dog and a cat.

Out of the 25 people, 9 have both a cat and dog, which means the probablity a student chosen at random has both is 9/25.

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Oliga [24]

Answer:

$81 < x$

Step-by-step explanation:

$\frac{x}{9} > 9 → x > 9 \times 9 → x > 81$

* The above answer is written in reverse, which is the exact same result.

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2 years ago

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weqwewe [10]

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2 years ago

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vlada-n [284]

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2 years ago

Perform the following division. Be sure answers are reduced to lowest terms. 2 7/8 ÷ 1/4 =

nalin [4]

Answer:

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2 7/8 / 1/4

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2 years ago

Rearrange the formula to make x the subject : 5( a - 2x) = 9(x + 1)

katovenus [111]

Answer:

x = $\frac{5a-9}{19}$

Step-by-step explanation:

Given

5(a - 2x) = 9(x + 1) ← distribute parenthesis on both sides

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5a = 19x + 9 ( subtract 9 from both sides )

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2 years ago