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Charra [1.4K]
3 years ago
14

Fred the clown can make 20 animal balloons every 15 minutes. How many can he make in 6 minutes and in 45 minutes

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
4 0
He can make 8 animal balloons in 6 minutes and 60 animal balloons in 45 minutes.
If this answer helps you, please choose it as the brainiest answer! :)

Katarina [22]3 years ago
3 0

Answer:

He can make 8 ballons in 6 minutes, and 60 ballons in 45 minutes.

Step-by-step explanation:

For this, we can use the "simple rule of three", a method of having three numbers to help calculate the unknown.

So, lets begin:

If the clown can make 20 animal ballons every 15 minutes, how many can make in 6 minutes?

20 ballons - 15 minutes

     x        -   6 minutes

x=\frac{6*20}{15} =8 ballones

In the same way, if the clown can make 20 animal ballons every 15 minutes, how many can make in  45 minutes?

20 ballons - 15 minutes

     y           -  45 minutes

y=\frac{45*20}{15}  = 60 ballons

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Step-by-step explanation:

We know that the standard quadratic equation is  ax^2+bx+c=0

Let's compare all the given equation to it and , find discriminant.

1. a=2, b= -7, c=-9

b^2-4ac=(-7)^2-4(2)(-9)=49+72>0

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2. a=1, b=-4, c=4

b^2-4ac=(-4)^2-4(1)(4)=16-16=0

So it has only 1 real number solution.

3. a=4, b=-3, c=-1

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4. a=1, b=-2, c=-8

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Thus it does not has real solutions.



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The probability that a randomly selected adult has an IQ less than

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Step-by-step explanation:

Assume that adults have IQ scores that are normally distributed with a mean of mu equals μ = 105 and a standard deviation sigma equals σ = 15

We need to find the probability that a randomly selected adult has an IQ less than 135

For the probability that X < b;

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∵ z = (X - μ)/σ

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