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
Anastasy [175]
2 years ago
13

How many ml of a 70% alcohol solution must be mixed with 2 ml of a 85% alcohol solution to make a 75% solution?

Mathematics
1 answer:
yaroslaw [1]2 years ago
3 0

Answer:

0.133 ml

Step-by-step explanation:

The two available solutions to be used in the mixture are a 70% solution and a 85% solution .

x = volume of 70% solution

y = volume of 85% solution

y = 2 ml

Therefore;

0.7 x + 0.85(2) = 0.75(x+2)

0.7x + 1.7 = 0.75x + 1.5

multiply through by 10 to get rid of the decimals

7x + 17 = 7.5x +15

collecting and simplifying

-0.5 x = -0.2

divide both sides by -1.5

   x = -0.2/-1.5

   x = <u>2/15 ml or 0.1333 ml</u>

You might be interested in
Emanuel has -$1,000 in his bank account. He
N76 [4]

Answer:

10 months

Step-by-step explanation:

Because he was at $-1,000 and he deposited $100 a month that he earns from watching the dogs so it took him 10 months to realize that his bank account is now at $0

6 0
3 years ago
Jim is designing a seesaw for a children’s park. The seesaw should make an angle of 45 degrees with the ground, and the maximum
balandron [24]

Answer:

B) 1.4

Step-by-step explanation:

The sine of an angle is equal to the ratio of the opposite side to the hypotenuse.

sin(B)=opp/hyp

3 0
2 years ago
Change 46% into fraction​
PSYCHO15rus [73]

Answer:

46/100 = 23/50

Step-by-step explanation:

I hope this helped plzz mark me as brainliest plzzzz

7 0
3 years ago
The bigger of two numbers is four more
Otrada [13]

Answer:

X=the smaller

y=the larger

The bigger of two numbers is four more than the smaller, then:

y=x+4

one more than twice the smaller is the same as the larger, then

1+2x=y

We have the following system of equations:

y=x+4

y=2x+1

We solve this system by equal values method:

x+4=2x+1

x-2x=1-4

-x=-3

x=3

We find the value of "y"now:

y=x+4

y=3+4

y=7

the values of x and y are:

x=3

y=7

Step-by-step explanation:

7 0
3 years ago
ASAP<br> -will mark brianist
Amiraneli [1.4K]

Answer:

20-12

35-21

40-24

Step-by-step explanation:

You times both numbers by the same value

5 0
2 years ago
Read 2 more answers
Other questions:
  • A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks.
    8·1 answer
  • Rayhana has a coupon for 15% off a single item at a store. If the item has a regular price of p dollars, then the sale price can
    13·2 answers
  • I'm lost on this one please help thank you
    7·2 answers
  • Determine which ratio forms a proportion with 6/9
    5·1 answer
  • Clark gives 3/10 of his allowance to charity. (&lt;&lt;&lt;
    13·2 answers
  • Write an inequality for the sum of a number and 15 is less than 30
    7·1 answer
  • Sketch the image of quadrilateral PQRS under the following dilations:
    8·1 answer
  • Use the elimination method to solve the system of equations. Choose the correct ordered pair<br>​
    5·1 answer
  • ANSWER ASAP GIVING BRAINLIEST AND STUFF!
    15·2 answers
  • Members of the track team can run 400 min an average time of 64.6 seconds. The
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!