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
TEA [102]
3 years ago
12

A chemist needs 90 milliliters of a 25% solution but has only 16% and 43% solutions available

Mathematics
1 answer:
Stels [109]3 years ago
4 0
Let f be amount of 43% and  s be amount of 16%...

s+f=90, f=90-s

(.16s+.43f)/90=.25  using f found above we get:

(.16s+.43(90-s))/90=.25

.16s+38.7-.43s=22.5

-.27s=-16.2

s=60, and since  f=90-s, f=30

So the chemist will need to mix 60ml of 16% solution with 30ml of 43% solution to create 90ml of a 25% solution.








You might be interested in
Express each in cubic metres:(a)600litres​
OverLord2011 [107]
It will be 600 cubic meters because cubic meters and liters are equal same goes with cubic centimeters and milliliter
5 0
3 years ago
Simplify 1.25 (-x -4)
maw [93]

Answer:

-1.25x-5

Step-by-step explanation:

5 0
2 years ago
What is the domain of the relation?
amm1812

Domain:

{-4, -2, -1 , 1, 4}


Hope it helps

3 0
3 years ago
What is the solution to the system of equations? y = A system of equations. Y equals StartFraction 2 over 3 EndFraction x plus 3
Sauron [17]

Answer:

The solution to the given system of equations is (-2,\frac{5}{3})

Therefore the values of x and y are x=-2 and y=\frac{5}{3}

Step-by-step explanation:

Given equations can be written as

y=\frac{2}{3}x+3\hfill (1)

x=-2x+3x=-2\hfill (2)

Solving equation(2) we get

x=-2

Substitute x=-2 in equation (1) we get

y=\frac{2}{3}(-2)+3

=-\frac{4}{3}+3

=\frac{-4+9}{3}

=\frac{5}{3}

Therefore the values of x and y are  x=-2 and y=\frac{5}{3}

The solution to the given system of equations is (-2,\frac{5}{3})

5 0
3 years ago
Read 2 more answers
Review the federal income tax table.
evablogger [386]

Answer:

Step-by-step explanation:

Tax payable:

= $4,543+($41,000-$39,476)×22%

= $4,543+$335.28

= $4,878.28

Tax rate:

= $4,878.28/$41,000

= 11.9%

<em>Hence, Tax rate is 11.9%</em>

7 0
2 years ago
Other questions:
  • Simplify 3x + 2(6x - 5)
    15·1 answer
  • On a miniature golf course the distance from the tee to the first hole is 96 inches the distance to the second hole is 3 yards o
    7·1 answer
  • I WILL MARK BRAINLIST
    6·1 answer
  • HELP FAST.
    11·1 answer
  • To get to the baseball game, Todd drove 2 hours and 10 minutes, stopped for 15 minutes, then drove 1 hour 15 minutes more to get
    5·2 answers
  • ON THIS YOU HAVE TO GRAHP EACH NUMBER INTO A NUMBERLINE
    7·2 answers
  • An expression is shown. 1/6 + 1/6 What is the value of the expression?
    12·2 answers
  • I need help with this question
    15·1 answer
  • A angle is measured in​
    14·1 answer
  • Which equation shows a true proportion
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!