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2 years ago

I need help on this question someone pls help

Mathematics

1 answer:

Rzqust [24]2 years ago

4 0

Answer:

3.2

Step-by-step explanation:

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What is the value of h?

nekit [7.7K]

Answer:

10ft

Step-by-step explanation:

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2 years ago

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.

5 0

3 years ago

Read 2 more answers

Express the ratio as a fraction in the lowest term.500m:1km

snow_lady [41]

Step-by-step explanation:

500:1000

500/500:1000/500(both divided by 500-

1:2

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3 years ago

If a 171 mile trip took 9 1/2 gallin of gas how much gas is needed for a 247-mile trip?

masya89 [10]

<span>9.5 gallons 171 miles
_______________
9.5 gallons x miles
_______________
x = 171(9.5)/247 =
</span>

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3 years ago

I need help it is I ready solve inequality’s level g

AfilCa [17]

Answer:

y≤−6. Everthing more or equal to -6 should be shaded. So like fro-6 to -10

Step-by-step explanation:

Multiply each term in 12y≤−3 by 2 to eliminate the fractions.

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2 years ago