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3 years ago

The ratio of boys to girls in a classroom 4:5 what is the meaning of this ratio

Mathematics

2 answers:

Naya [18.7K]3 years ago

5 0

Answer: There is an important difference between the way counts are viewed in ratio to that in fractions. The ratio of boys : girls →4:5 so you have 4 boys and 5 girls making the whole count 4+5=9 in its simplest form. ... girls →59 of the whole.

Step-by-step explanation: have a good day!

alexira [117]3 years ago

5 0

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The Above ratio can be stated as :

There is 4 boys for every 5 girls in the class, Therfore the Correct choice is :

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The Thomas family bought 5 subs and 4 drinks. They spent 49.50 write and equation that models this situation define x and y vari

OlgaM077 [116]

Answer:

5x+4y=49.50, where:

x is the price per sub

y is the price per drink

Step-by-step explanation:

From the information provided, you can say that the result of adding up the price per sub for the quantity plus the price per drink for the quantity is equal to 49.50 that is the total amount spent, which can be expressed as:

5x+4y=49.50, where:

x is the price per sub

y is the price per drink

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3 years ago

A drug company conducts trials of a new vaccine for a rare but usually fatal disease. The company creates a

GalinKa [24]

Answer:

What can be said about the model are;

1) The company predicts 4 failures before success

2) Each trial is independent

3) The probability is the same for each trial

4) Success is defined as preventing the disease

Step-by-step explanation:

The probability of success for the vaccine, p = 0.2

Therefore, the probability that the vaccine is effective and prevents the disease = 0.2

A geometric distribution probability of success is given by the following formula;

P(X = x) = p × q⁽ˣ⁻¹⁾

The expected value, E(Y) = 1/p

The number of failures before success, E(Y) = (1 - p)/p = (1 - 0.2)/0.2 = 4

Where;

q = The probability of a trial failing = 1 - p = 1 - 0.2 = 0.8

q = 1 - p

∴ The e

The geometric model criteria are;

a) Each trial can only have one of two outcomes success or failure

b) The probability of success for each trial is fixed

c) The geometric distribution is concerned with finding how many trials are required to get one success

d) The trials are independent

Therefore, we have;

The number of failures the company predicts before a success = 4 failures

2) The trials are independent

3) Each trial has an equal probability

4) Success is defined by the effectiveness of the vaccine in the prevention of the disease

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3 years ago

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irga5000 [103]

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3 years ago

A town's yearly snowfall in inches over a 10-year period is recorded in this table. What is the mean of the snowfall amounts?

lawyer [7]

So to find the mean you add them all together and divide by the number of numbers there is so 11+15+19+17+23+20+17+18+21=174 and there are 10 numbers so it would be 174/10 which is 17.4 so you answer is 17.4

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3 years ago

Which graphs have rotational symmetry? Check all of the boxes that apply.

ivanzaharov [21]

Answer:

The correct option are;

On a coordinate plane, a cubic function has an x-intercept of (0, 0)

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Step-by-step explanation:

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For a cubic function that has x-intercept = (0, 0) we have;

y = f(x) = a·x³ + b·x² + c·x

Has the shape f a fan blade and therefore, looks the sane when rotated when rotated through 180°

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8 0

3 years ago

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The ratio of boys to girls in a classroom 4:5 what is the meaning of this ratio​

The ratio of boys to girls in a classroom 4:5 what is the meaning of this ratio