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liubo4ka [24]
3 years ago
8

How much water should be added to 14mL of 15% alcohol solution to reduce the concentration to 7%

Mathematics
1 answer:
leonid [27]3 years ago
6 0
You would need 12ml of water.

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This is for adding and subtracting polynomials, word problems. I have real difficulty with word problems in math, so please help
Dennis_Churaev [7]

please see the attached picture for full solution

Hope it helps..

8 0
2 years ago
Which is better: Car A that travels 308 miles on 11 gallons of gasoline OR Car B that travels 406 miles on 14 gallons of gasolin
Jet001 [13]
\begin{gathered} \text{Car A travels 308 miles on 11 gallons, so, the ratio of miles per galon is} \\ \frac{308}{11}=28\text{ miles per gallon} \\  \\ \text{for the car B, the ratio is} \\ \frac{406}{14}=29\text{ miles per gallon} \end{gathered}

thus, the best car is car B,because it can tavel 29 miles with only one gallon,andcar A can only travel 28 miles with one gallon.

5 0
1 year ago
paden payes $2.10 for 5 1/2 pounds of bananas. Alyssa pays $3.25 for 6 1/2 of bananas. Which is the better buy
Kazeer [188]
$2.10 for 5 1/2 lbs.
4 0
2 years ago
(Picture) MULTIPLYING MONOMIALS AND BINOMIALS
motikmotik

Answer:

Second option: 81y^4 - 16x^2, the difference of squares

Step-by-step explanation:

(9y^2-4x)(9y^2+4x) is a special product named difference of squares, then we can apply this formula:

(a-b)(a+b)=a^2-b^2, with a=9y^2 and b=4x, then:

(9y^2-4x)(9y^2+4x)=(9y^2)^2 - (4x)^2

(9y^2-4x)(9y^2+4x)=(9)^2 (y^2)^2 - (4)^2 (x)^2

(9y^2-4x)(9y^2+4x)=81y^(2*2) - 16x^2

(9y^2-4x)(9y^2+4x)=81y^4 - 16x^2


7 0
3 years ago
Equalenlent expression to 24y+16 with distributive propertie
Inessa [10]

8(3 y+2)

Step-by-step explanation:

To apply the distributive property you need to use parentheses and multiply outside numbers with inside numbers or terms

24 y+16

8(3 y+2)

Learn More

Distributive Property:brainly.com/question/11916234

Keywords: equivalent expression, distributive property

#LearnwithBrainly

6 0
3 years ago
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