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
STatiana [176]
2 years ago
6

A chemist mixes a 10% hydrogen peroxide solution with a 25% hydrogen peroxide solution to create 30 liters of a 15% hydrogen per

oxide solution. How many liters of the 10% solution did the chemist use to make the 15% solution?
Mathematics
1 answer:
FromTheMoon [43]2 years ago
8 0
Your two equations are at the top, in the box is what each variable represents. Below the box is total liters of the 15%, which is going to equal the total liters for 10% plus the total liters for 25%. Make your percentages into decimals. There’s a total of 30 liters so, x+y needs to equal 30. Isolate a variable, I chose y, you can do either or (isolating x would be more math). Y is going to equal 30-x, substitute that for the Y in the second equation, then you need to distribute 0.25 into 30-x. Then it’s simple math, subtract 7.50 from both sides, add like gets, divide both sides by -0.15, making x=20.

You might be interested in
Why is the square root of 7 irrational
BigorU [14]

Answer:

dude you should know this one it's obviously not see and if it's a perfect square root then it wouldn't be irrational the answer B

3 0
3 years ago
Identify all sets to which the number 3/2 belongs
AveGali [126]

Answer:

1 ½

Step-by-step explanation:

Step 1) Go to Play Store / Apple Store.

Step 2) Search for "Photomath".

Step 3) Put any problem one the advance calculator.

Step 4) get It right!

3 0
3 years ago
Two step equation<br><br> 1 - r = -5
Colt1911 [192]

Answer:

<h2><u><em>r = 6</em></u></h2>

Step-by-step explanation:

two step equation

1 - r = -5

r = -5 + (-1)

r = 6

------------

check

1 - 6 = -5

-5 = -5

the answer is good

7 0
1 year ago
Read 2 more answers
2
zhenek [66]

Answer:

Just substitute the values in!
(-5/9) + (-4/3) - 2/3 = - 5/9 - 12/9 - 6/9 = -23/9.

7 0
2 years ago
PLEASE HELP
asambeis [7]
Answer for the first one is just 7/9, 28/36

Second one is 9/14, 3/4

For the third one you multiply 12.50 by 5 which gives you 62.5
4 0
3 years ago
Other questions:
  • Rashid and Megan make 8 costumes for the play.Each costume needs 5 felt patches.How can Rashid and Megan use a table to find out
    6·1 answer
  • SOMEONE ANSWER THIS ASAP PLEASEEEE!!!
    13·1 answer
  • Earth has been charted with vertical and horizontal lines so that points can be named with coordinates. The horizontal lines are
    10·2 answers
  • What is the solution to this system of equations x-3y=-2 x+3y=16
    10·1 answer
  • If events A and B are independent and the probability that event A occurs is 83%, what must be true
    6·2 answers
  • 100 POINTSSS!!!!!!!!!!!!!which of these numbers are irrational?
    14·2 answers
  • A(x)= -5x+ 8. Find a (7)
    7·2 answers
  • Please help me with number 13 and 14
    6·2 answers
  • HELPPPPPPPPPPPPPPPPPPPPPpp
    14·1 answer
  • Pls can u tell me the answer for this and clue: it end with the cm 2 thing
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!