2 years ago

The ratio of red balloons to blue balloons at a party is 4 to 9. If there are 20 red balloons, how many blue balloons are there?

Mathematics

1 answer:

STALIN [3.7K]2 years ago

5 0

Answer:

Step-by-step explanation:

4/9 to 20/x

cross multiply and divide to get your answer

4 20

9 x

4x=180

x=45

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**Answer the question.**

guapka [62]

Answer:

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Step-by-step explanation:

y=mx+b

m = slope = 4/5

b = y-intercept= 1

y=4/5x+1

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3 years ago

1. Miles and Simon do chores to earn an allowance from their parents. Miles has $120 saved and gets a $10 allowance per week. Hi

Ket [755]

Answer:

If w represented the number of weeks he does his chores, the equations would be:

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3 years ago

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2 years ago

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tigry1 [53]

Answer:

x=0

Step-by-step explanation:

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3 years ago

Suppose that the weights of 5400 registered female Labrador retrievers in the United States are distributed normally with a mean

Maurinko [17]

Answer:

$N= 4543$ Labrador retrievers

Step-by-step explanation:

We know that the mean $\mu$ is:

$\mu = 62.5$

and the standard deviation $\sigma$ is:

$\sigma=2.5$

The probability that a randomly selected Labrador retriever weighs less than 65 pounds is:

$P(X$

We calculate the Z-score for X =65

$Z = \frac{X-\mu}{\sigma}\\\\Z =\frac{65-62.5}{65}=1$

$P(X$

Looking in the table for the standard normal distribution we have to:

$P(Z$ .

Finally the amount N of Labrador retrievers that weigh less than 65 pounds is:

$N = P(X$

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$N= 4543$ Labrador retrievers

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3 years ago