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nataly862011 [7]
3 years ago
12

How many liters of a 40% sugar solution must be mixed with 30 liters of a 60% sugar solution to make a 56 % sugar solution?

Mathematics
2 answers:
julia-pushkina [17]3 years ago
6 0

Answer

7.5 liters

Step-by-step explanation:

We need to make an equation.

40%, x liters

60%, 30 liters

=56%

0.40(x) + 0.60 (30) = 0.56 (x + 30)

0.40x + 18 = 0.56x + 16.8

18 - 16.8 = 0.56x - 0.40x

1.2 = 0.16x

7.5 = x

If this is correct, listen and stan BLACKPINK and BTS!!

konstantin123 [22]3 years ago
5 0

Answer:

7.5 liters of a 40% sugar solution

Step-by-step explanation:

Let

x ----> liters of a 40% sugar solution

Remember that

40\%=40/100=0.40\\60\%=60/100=0.60\\56\%=56/100=0.56

we know that

The amount of liters of a 40% sugar solution (x) multiplied by 0.40 plus the amount of liters of a 60% sugar solution (30 L) multiplied by 0.60 must be equal to the total amount of liters mixed (x+30) multiplied by 0.56

0.40x+0.60(30)=0.56(x+30)

solve for x

0.40x+18=0.56x+16.8\\0.56x-0.40x=18-16.8\\0.16x=1.2\\x=7.5\ L

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true

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The bill for your dinner is $91. You leave a $15.47 tip. What is the percent of tip?
mixas84 [53]

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A $500 television is on sale for 20% off. However, you must pay 6% in sales tax. What is the final price of the television after
GrogVix [38]

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Work out the volume of the shape​
pashok25 [27]

Answer:

\large\boxed{V=\dfrac{1,421\pi}{3}\ cm^3}

Step-by-step explanation:

We have the cone and the half-sphere.

The formula of a volume of a cone:

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V_c=\dfrac{1}{3}\pi(7^2)(15)=\dfrac{1}{3}\pi(49)(15)=\dfrac{735\pi}{3}\ cm^3

The formula of a volume of a sphere:

V_s=\dfrac{4}{3}\pi R^3

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Therefore the formula of a volume of a half-sphere:

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3 years ago
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