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
xxMikexx [17]
3 years ago
7

Serena is making an experiment. For that, she needs 20 grams of a 52% solution of salt. She has two large bottles of salt water:

one with 40% and the other with 70% of salt in them. How much of each must she use to make the solution she needs?
Mathematics
1 answer:
Fudgin [204]3 years ago
5 0
X + y = 20 --> eqn 1
The second equation would be the mass balance shown below:
(x)(0.40) + y(0.70) = 20(0.52) --> eqn 2
Rearranging eqn 1,x = 20 - ySubstitute this to eqn 2:
(20 - y)(0.40) + y(0.70) = 20(0.52)Solve for y,y = 8 grams Finally, solve for x.x = 20 - 8 = 12 grams
Therefore, Serena needs 12 grams of the 40% solution and 8 grams of the 70% solution.
 
You might be interested in
Write 13 tens as a sum of hundreds and tens
Katyanochek1 [597]
I think it is 130. I hope this helps! :D
3 0
3 years ago
Read 2 more answers
A computer store buys a computer system at a cost of $465.60. The selling price was first at $776, but then the store advertised
Diano4ka-milaya [45]

Answer: a: 543.2 b: 465.6

Step-by-step explanation:

a. find 30% of $776, which is 232.8. subtract 232.8 from 776.

b. find 40% of $776, which is 310.4. subtract 310.4 from 776

3 0
3 years ago
Find the equation of the line that passes through the pair of points. Write your answer in slope-intercept form. (-3,0) (0,5)
Hatshy [7]

Answer:

y= (5/3) x + 5

Step-by-step explanation:

y = mx + b

m = (5 - 0)/(0 - (-3)) = 5/3

y = (5/3)x + b

b = 0-(5/3)(-3) = 5

y = (5/3)x + 5

6 0
3 years ago
Why it does not matter which two points you pick when you calculate the slope?
andrew11 [14]

Answer:

Because when you are finding slope the line must be linear and because it is linear it doesnt matter which point you get because you get the same answer (you can try it yourself)

Step-by-step explanation:


4 0
3 years ago
A school is holding a talent show. A group of six friends entered the talent show and won the first place prize of $45, which th
Lesechka [4]

Answer:

awwww shoot I really don't know know but I can maybe at least try to help you out and get some help to help you. I really don't make sense awww me

4 0
3 years ago
Read 2 more answers
Other questions:
  • Write the polynomial in standard form. Then name the polynomial based on it's degree and number of terms
    6·1 answer
  • Find the value of the underlined digit in 16403
    10·2 answers
  • find the exponential model of best fit for the points (-3,5),(1,12),(5,72),(7,137). Explian how you got your answer. Round value
    5·1 answer
  • Simplify the expression below.
    8·1 answer
  • A bakery uses 475 pounds of apples to make 1000 apple tart each tart contains the same amount of apples how many pounds of apple
    9·2 answers
  • 0.002 is 1/10 of what
    8·1 answer
  • A train can hold 444 people in rows with 4 seats. How many 4-seat rows are there ?
    6·2 answers
  • Micah wants to show the value 8/3 on the number line .. where should micah put the value 8/3 ?
    6·1 answer
  • Jeordie spreads out a rectangular blanket with an area of 42 square feet. Its width is 6 feet. Which equation could you use to f
    5·2 answers
  • Pls help and explain. I will give brainliest
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!