1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ira [324]
3 years ago
15

A chemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. The table show

s the amount of each solution used. What is the value of x, the acid concentration of the first solution? 0.05 0.10 0.15 0.20 Mark this and return
Mathematics
2 answers:
kondaur [170]3 years ago
6 0

Given that amount of first acid solution = 4 liters

Let concentration of the first acid solution = x

then effective amount of first solution = 4x


Given that amount of second  acid solution = 10 liters

Givn that concentration of the second acid solution = 40% = 0.4

then effective amount of second solution = 0.4(10)


Then amount of resulting acid solution = (4+10) liters

Givn that concentration of the resulting acid solution = 30% = 0.3

then effective amount of resulting solution = 0.3(4+10)


Combining all those results gives equation

4x +0.4(10) = 0.3(4+10)

4x +4 = 0.3(14)

4x +4 = 4.2

4x = 0.2

x=0.05


Hence final answer is 0.05 or you can say 5%.



lukranit [14]3 years ago
5 0

Answer:

0.05

Step-by-step explanation:

on e2020

You might be interested in
The number of boys in a club is 10 more than half the number of girls.
Sav [38]

Answer:

40 girls

Step By Step Explanation:

assume boys = y girls = x

y = 1/2x + 10

y = 30

30 = 1/2x + 10

1/2x = 20  

x = 20 *2 = 40

girls is  40   boys is 30

6 0
2 years ago
Do men’s voting preferences differ significantly from women’s voting preferences?"" Use a level of significance of α = 0.05. Whi
baherus [9]

Answer:

<em>H₀</em>: The voting preference of men and women are not different.

<em>Hₐ</em>: The voting preference of men and women are not different.

Step-by-step explanation:

A hypothesis test for two proportions can be used to determine whether the preference of men differ from women in case of voting.

A Chi-square test contingency table can be used to perform the test.

The hypothesis can be defined as:

<em>H₀</em>: The voting preference of men and women are not different.

<em>Hₐ</em>: The voting preference of men and women are not different.

The test statistic is:

\chi^{2}=\frac{Row\ total\times Column\ total}{N}

Decision rule:

If the <em>p</em>-value of the Chi-square test statistic is less than the significance level <em>α</em> = 0.05 then the null hypothesis will be rejected. And if the <em>p</em>-value is more than the significance level then the null hypothesis will not be rejected.

8 0
3 years ago
If -4(x-3)+5x=24, then x= what?
navik [9.2K]
The answer to this question would be x = 12, using pemdas.
4 0
3 years ago
Determine whether these two functions are inverses. ​
11Alexandr11 [23.1K]

Answer:

No The reactions are not inverses to each other

Step-by-step explanation:

f(x) = 3x + 27

Let f(x) be y

y= 3x+27

subtracting 27 on both sides

3x = y - 27

x= (y-27)/3

= y/3 - 9

inverse function is x/3 -9 not x/3 + 9

Therefore, not an inverse

Hope it helps...

6 0
3 years ago
Ten years ago, Rapunzel's hair was 19 long. Now her hair is 20193 long. Approximately how many times as long is Rapunzel's hair
vladimir2022 [97]

Answer:

A.

Step-by-step explanation:

if you simplify the equation on A., you'll get 1,000 as the number.  Rapunzel's hair was approximately 1,000 times longer than it was 10 years ago.

8 0
3 years ago
Other questions:
  • Which is longer 5 miles or 5 kilometers?​
    12·2 answers
  • Find two numbers whose sum is 0 and who's difference is 8
    11·2 answers
  • Solve the following absolute value inequality,<br> 2/2x-1| +4 &lt; 10
    13·1 answer
  • Which of the following formulas could be used to find the perimeter, P, of a regular hexagon? brainleist
    14·1 answer
  • The data set shows the number of goals the Blue Mountain Soccer Team scored in the last twelve games. 4, 3, 1, 4, 3, 2, 1, 3, 5,
    14·1 answer
  • Steve bought 4 tickets at $n dollars to the movie. He spent $ 6 on popcorn. Write an expression for how much Steve spent.
    7·2 answers
  • Find the range of the function represented by the list of ordered pairs below.
    11·1 answer
  • Condition statement
    8·1 answer
  • What is the slope for the points (-1, 1) and (2, 3)?
    12·1 answer
  • So uh can someone answer this for me please i don’t understand it
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!