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julia-pushkina [17]
3 years ago
11

The ratio of the number of girls to the number of all students in the class is 4 to 9. Are there more boys or more girls in that

class?
Help me plss
Mathematics
2 answers:
Alexxx [7]3 years ago
8 0
If there are 4 girls to every 9 students, then there are 5 boys to every girl, 9-4=5. So, there are more boys in the class.
OleMash [197]3 years ago
4 0
If there is a ratio of girls to the whole class/the boys and that ratio is 4:9, and the 4 represents the girls that means there are 5 boys.There for there are more boys than there are girls.
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Step-by-step explanation:

Let s be the speed of boat in still water

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So, Distance traveled in upstream =Speed \times time =(s-4) \times \frac{30}{60}

Downstream speed = s+4

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So, (s-4) \times \frac{30}{60}=(s+4) \times \frac{20}{60}

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Step-by-step explanation:

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3 years ago
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timurjin [86]

\text{if is}\ f(x)=\sqrt{7x+21}\ \text{then the domain is:}\\\\7x+21\geq0\ \ \ |-21\\7x\geq-21\ \ \ \ |:7\\x\geq-3\to x\in[-3;\ \infty)


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6 0
3 years ago
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Zepler [3.9K]

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<h2>8 or -8</h2>

Step-by-step explanation:

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7 0
3 years ago
How do i do part a) and b)?
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6,12,24,48,96... when we multiply by 2
-6,12,-24,48,-96.... when we multiply by -2
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c)  a(n)=6*2^(n-1)
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6 0
3 years ago
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