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3 years ago

Please help!! Would be gladly appreciated!

Mathematics

1 answer:

Vanyuwa [196]3 years ago

8 0

A and C do as the variable that is changing would be the exponent making it an exponential function

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Of 560 marbles in a bag, 65% are red and the rest are blue. After 28 red marbles are replaced with blue ones, how many blue marb

jonny [76]

Answer: The answer is 400 blue marbles.

Step-by-step explanation: Given that there are 560 marbles in a bag, out of which 65% are red and rest are blue.

So, number of red marbles is

$n_r=65\%\times 560=\dfrac{65}{100}\times 560=364,$

and number of blue marbles is

$n_b=560-364=196.$

Now, if 28 red marbles are replaced by blue marbles, the the new number of red and blue marbles will be

$n_r^\prime=364-28=336~~~\textup{and}~~~n_b^\prime=196+28=224.$

Now, to get 65% of the marbles blue, we need to add some more blue marbles to the bag. Let 'x' number of blue marbles are added to the bag, then

$65\%\times (560+x)=224+x\\\\\Rightarrow \dfrac{65}{100}\times (560+x)=224+x\\\\\Rightarrow 13(560+x)=20(224+x)\\\\\Rightarrow 7280+13x=4480+20x\\\\\Rightarrow 7x=2800\\\\\Rightarrow x=400.$

Thus, 400 blue marbles need to be added to the bag.

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3 years ago

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A tour bus travels 2,160 miles in 36 hours. What is the average distance the bus travels in one hour?

Yuki888 [10]

60 miles because 2160 divided by 36 = 60

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For which equation would n = 0 not be a solution?

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For the first equation n + 4 = 5, because 0 + 4 is not equal 5

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The first house lot was 250 feet by 300 feet and the second house lot was 350 feet by 400 feet. The cost per square foot to purc

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Continuous

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The numbers do not follow a pattern In golf in order for them to be Categorical they must follow a pattern in which the numbers follow the same path or course these numbers do not.

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