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3 years ago

9

If there are 3 green marbles and 4 blue marbles in a box, what is the probability that a blind-folded person would pick a blue m

arble?

1 answer:

Ierofanga [76]3 years ago

8 0

The probability of picking a blue marble would be 4 out of 7

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Alenkasestr [34]

3•y+2
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Cual es el volumen del cubo de rubick cuya arista mide 3 cm

Natasha2012 [34]

For this case we are asked the following question:

"What is the volume of the rubick's cube whose edge measures 3 cm"

By definition, the volume of a cube is given by:

$V = l ^ 3$

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According to the statement we have:

$l = 3 \ cm$

Substituting:

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3 years ago

Solve the proportions using cross products. Round to the nearest hundredth is necessary. 21miles/49hours = 15miles h hours

SSSSS [86.1K]

$\dfrac{21}{49}=\dfrac{21:7}{49:7}=\dfrac{3}{7}\\\\\dfrac{21}{49}=\dfrac{15}{h}\to\dfrac{3}{7}=\dfrac{15}{h}\qquad\text{cross multiply}\\\\3h=(7)(15)\\\\3h=105\qquad\text{divide both sides by 3}\\\\\boxed{h=35}\\\\Answer:\ 35\ hours$

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4 years ago