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
Anarel [89]
2 years ago
15

A chemist is mixing a 50% salt solution with an 18% salt solution to make 40 L of a new solution that will contain 30% salt. How

much of each of the original solutions should the chemist use?
Mathematics
1 answer:
Karolina [17]2 years ago
3 0

Answer:

See below

Step-by-step explanation:

Sum of ingredients = sum of final solution

.50 x      where x =   50 percent amount    then 40 - x = 18% amount

.50 x    + .18(40 - x)   =   .30 ( 40 )

.50 x   + 7.2 - .18x  =   12

.32x  = 4.8

x = 15 L of 50%     25 liters of 18%

You might be interested in
P=$222 r=12% Y=10 A=?
sergey [27]
To solve for the A or the principal amount plus interest you can use two formulas:

A = P + I

Where: P = Principal
             I  = Interest

or you can use 

A = P (1+ rt)

Where: P = principal
             r  = rate in decimal
             t  = time in years

With your given you can use the second one, without having to use the first. 
Given that the Principal amount is $222 and the rate is 12% and time is 10 years, we first need to convert your rate into decimal by dividing the value in percent by 100 which will yield 0.12. 

Then now we can just input the data that you know into the formula:
A = P(1+ rt)
   = $222(1 + (0.12)(10))
   = $222(2.2) 
   = $488.40

Your A is then equal to $488.40

If you need to get the simple interest all you need to use is the first formula given:

A = P + I
for the interest you transpose the P to the side of the A and you will get:
I = A - P
  = $488.40 - $222
  = $266.40

$266.40 is the added interest to the principal amount. 
7 0
3 years ago
1/2 x 2/4 x 3/6 x 4/8 x 5/10 x 6/12 simplified
Talja [164]

Answer: 3

Step-by-step explanation: Because, 1/2=2/4=3/6=4/8=5/10=6/12 are all the same. You can test is out by simply factoring out the biggest factor on both sides. For example, 2/4 can be simplified to 1/2, because 2/4=(2/2)/(4/2) you can divide both sides by two. Hope this helps, <3!

8 0
3 years ago
Please help me with this math
motikmotik
The answer must be 2.333333333 × 10^5
3 0
2 years ago
Read 2 more answers
The system with one and only one solution set is called a/an system
beks73 [17]

Answer:

Consistent and Independent System

Step-by-step explanation:

A system with at least one solution is a consistent system.  A consistent system is said to be independent if it has <u>exactly one solution</u> (often referred to as the <em>unique</em> solution).  The graphs intersect at exactly one point, which gives an ordered-pair (x, y) as the solution of the system.  

6 0
2 years ago
A pound is equal to 0.454 kilograms, how many kilograms does a 142-pound man weigh
levacccp [35]

Answer:

64.468

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • Jim paid a gym membership fee of $50, plus $20 per month.jim has paid a total of $290 to the gym.which equation matches this sit
    9·2 answers
  • What is a number that is divisible by 3, 5, and 9 but not divisible by 2, 4, 6?
    13·2 answers
  • a bookcase has two shelves the top shelf has 10 more than one-third the number of books on the bottom shelf there are 12 books o
    7·2 answers
  • A keycode must contain 2 letters and 3 numbers. The letters may be any letter of the alphabet. The numbers should be any number
    6·2 answers
  • four friends went scuba diving today.ali dove 70 feet, tim went down 50 ft, carl dove 65 feet, and brenda reached 48 feet below
    9·1 answer
  • Your cousin gave you $0.72 with which to buy a gift. This covered 9/10 of the cost. How much did the present cost?
    7·1 answer
  • 34​% of U.S. adults have very little confidence in newspapers. You randomly select eight U.S. adults. Find the probability that
    13·1 answer
  • What is 7 raised to the power of 1?
    14·2 answers
  • Match the following three dimensional figures to the appropriate nets below.
    12·2 answers
  • 4<br> How many 3-cup servings are in 4 cups?<br> A. 1/2<br> B. 2/<br> C. 4<br> D. 12
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!