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Agata [3.3K]
3 years ago
8

In a primary school class, the ratio of boys to girls is 3:4. If there are 12 girls in the class, what is the total number of st

udents in the class? *
Mathematics
2 answers:
AfilCa [17]3 years ago
7 0

Answer:

21

Step-by-step explanation:

sergey [27]3 years ago
4 0

A ratio of 3:4 means that for every 3 boys there are 4 girls and vice versa.

12 girls / 4 girls = 3

3 boys * 3 = 9 boys

There are 9 boys in the class.

9 boys + 12 girls = 21 total students

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What is the greatest common factor of 35,10
storchak [24]

Answer:

5

Step-by-step explanation:

Factors of 35: 1,5,7,35

Factors of 10: 1,2,5,10

5 is the greatest common factor.

4 0
3 years ago
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Which trig ratio uses hypotenuse and adjacent side
e-lub [12.9K]

Answer:

It's cosine.

Step-by-step explanation:

Cosine is Adjacent / Hypotenuse.

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Which option is an even function?
Grace [21]

The correct answer is option D. Which is the even function is f (x) = x⁴.

<h3>What is an even function?</h3>

The function in which when the sign of the input variable is changed the output remains the same is called the even function. Mathematically we can write it as f(x) = f(-x ).

let us check the given four options:-

A f(x) = √x ;  f(-x) = √-x  here f(x) ≠ f(-x)

B f(x) = x ;  f(-x) = -x    here f(x) ≠ f(-x)

C f(x)  = x³ + 1 ; f(-x) = -x³ + 1  here f(x) ≠ f(-x)

D f(x)  = x⁴  ;  f(-x) = (-x)⁴ = x⁴  here f(x) = f(-x)

We can see that in the option D the f(x) = x⁴ is an even function because f(x) = f(-x).

Therefore the correct answer is option D. Which is the even function is f (x) = x⁴.

To know more about even functions follow

brainly.com/question/2284364

#SPJ1

4 0
2 years ago
Which of the following lists is in order from smallest to largest?
Yuri [45]
C. 1.5%, 0.125, 3/20, 1 4/5 is the correct answer
3 0
3 years ago
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A cable car starts off with n riders. The times between successive stops of the car are independent exponential random variables
nikitadnepr [17]

Answer:

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Solution:

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Now, suppose the T_{i} is the time between the departure of the rider i - 1 and i from the cable car.

where

T_{i} = independent exponential random variable whose rate is \lambda

The general form is given by:

T_{i} = \lambda e^{- lambda}

(a) Now, the time distribution of the last rider is given as the sum total of the time of each rider:

S_{n} = T_{1} + T_{2} + ........ + T_{n}

S_{n} = \sum_{i}^{n} T_{n}

Now, the sum of the exponential random variable with \lambda with rate \lambda is given by:

S_{n} = f(t:n, \lamda) = \frac{\lambda^{n}e^{- \lambda t}t^{n - 1}}{(n - 1)!}

5 0
3 years ago
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