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Dmitriy789 [7]
3 years ago
8

A box contains 146 marbles which are either red or blue. there are 28 more blue marbles than red marbles. how many blue marbles

are in the box?
Mathematics
1 answer:
rusak2 [61]3 years ago
6 0
R + b = 146.  Supposing that b=r+28, 

r + (r+28) = 146, or 2r + 28 = 146.

Simplifying:  2r = 118.  Then r = 59, and b = r+28 = 59+28 = 87 blue marbles
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What is the value of this expression: 2 + 42 - 6 x 25 + 3
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3 years ago
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Your friend finds that the correlation between shoe size and iq is r = 1. 99. what should you say about these findings?
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An error was made, correlation values can't be greater than 1.00.

The strength of the linear association between two variables is quantified by the correlation coefficient. The correlation coefficient always takes a value between -1 and 1. The 1 represents the perfect positive correlation and -1 represents the perfect negative correlation whereas the 0 represents the no correlation between two variables.

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2 years ago
Experimental vs. Theoretical Probability:
liubo4ka [24]
Hello Nitagomez,

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So it makes sense that when you roll the cube 60 times, you should have 30 even numbers. The theoretical probability is 30.

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The predication is off by 33%, I would argue that it is not a very good prediction.

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