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4 years ago

The ratio of boys to girls in a class is 4:5, what fraction of the class is boys

Mathematics

2 answers:

scoundrel [369]4 years ago

8 0

Boys:girls = 4/5

boys = 4/(4+5) = 4/9 of the class

Naya [18.7K]4 years ago

7 0

Total no boys and girls be 4x and 5x
there total students =9x
no of boys by total no of students =4x/9x
4/9

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Step-by-step explanation:

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3 years ago

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Effectus [21]

The equation of the rotating light is an illustration of a secant function

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The equation is a secant function represented by

$y =A\sec(Bt)$

Where:

A represents the amplitude

So, we have:

$A = 40$ --- the distance of the light from each square wall

B represents the period, and it is calculated as:

$B = \frac{2\pi}{T}$

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This means that,

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So, we have:

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Rewrite as a function

$d(t) = 40\sec(\frac{\pi}{3}t)$

Hence, the equation that represents the distance between the center of the circle and the light source is $d(t) = 40\sec(\frac{\pi}{3}t)$

Read more about trigonometry functions at:

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2 years ago

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3 years ago

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3 years ago

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Sidana [21]

Answer:

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"is" translates to "=".

"of" translates to "×".

We can let "what number" translate to "w".

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56 is 85% of what number . . . . translates to ...

56 = 0.85×w

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Of course, you know that 85% = 85/100 = 0.85.

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4 years ago