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
Luden [163]
3 years ago
13

HELPP ME PLZ WILLING TO SEND MONEY! It’s urgent

Mathematics
2 answers:
BaLLatris [955]3 years ago
8 0

Answer:

Devon needs to add 60 mL of 5% acid solution and 30 mL of 20% acid solution

Step-by-step explanation:

It knows acid and water concentration for every solution. 2 equations are proposed because there are two unknowns. V1= volume 5%acid and V2 =volume 20% acid

Acid V1(0.05)+V2(0.2)=90mL(0.1)

Water V1(0.95)+V2(0.8)=90mL(0.9)

Clearing V1 from acid equation having to: V1=180-4V2

Replacing V1 in the water equation having to: (180-4V2)(095)+V2(0.8)=81

Clearing V2 = 30mL

Replacing in water equation V1(0.05)+30(0.2)=9 So, V1=60mL

ExtremeBDS [4]3 years ago
7 0

Answer:

I think it would be 5 and 5 of each solution

You might be interested in
4x^2-24x+4y^2+72y=76
podryga [215]
<span>Simplifying 4x2 + -24x + 4y2 + 72y = 76
Reorder the terms: -24x + 4x2 + 72y + 4y2 = 76
Solving -24x + 4x2 + 72y + 4y2 = 76
Solving for variable 'x'.
Reorder the terms: -76 + -24x + 4x2 + 72y + 4y2 = 76 + -76
Combine like terms: 76 + -76 = 0 -76 + -24x + 4x2 + 72y + 4y2 = 0
 Factor out the Greatest Common Factor (GCF), '4'. 4(-19 + -6x + x2 + 18y + y2) = 0
 Ignore the factor 4.

</span><span>Subproblem 1
Set the factor '(-19 + -6x + x2 + 18y + y2)' equal to zero and attempt to solve: Simplifying -19 + -6x + x2 + 18y + y2 = 0 Solving -19 + -6x + x2 + 18y + y2 = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.
The solution to this equation could not be determined.</span>
7 0
3 years ago
Write a real world problem that you could represent with the equation 20 - n = 4. Solve the equation to find the answer to your
larisa [96]

Answer:

I used 16 out of my 20 dollars to buy some chips at the cvs now I only have 4 dollars to spare.

6 0
3 years ago
Read 2 more answers
What is the value of x?<br>23<br>35<br>58<br>93
katen-ka-za [31]
X is 35, if you follow the rules of alternate angles
4 0
3 years ago
Read 2 more answers
Working alone, it takes Chelsea 13 hours
Tems11 [23]

Answer:

24 hours

Step-by-step explanation:

hoped this helped

7 0
3 years ago
How do you find the constant of proportionality<br>​
marta [7]

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate. The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other.

4 0
2 years ago
Other questions:
  • PLEASE ANSWER! ASAP thank you!!
    15·1 answer
  • Write the quadratic equation whose roots are -5 -4 and whose leading coefficient is 4
    6·1 answer
  • Find real numbers a and b such that the equation a+bi=13+9i is true.
    10·1 answer
  • (x-13)<br> (2x-1)<br> If mZWVY= 70°, find mZYVX.<br> A. 15°<br> B. 28°<br> C. 55°<br> D. 70°
    13·1 answer
  • Hector is scuba diving at a position 32.75 feet below sea level. He descends 0.5 foot each minute for 15 minutes. What is Hector
    7·1 answer
  • Solve for the value of x and y if ADCB - NOPM.<br> I need that please
    11·1 answer
  • What is the slope of the line that passes through 2,-3 and -2,10​
    14·1 answer
  • If tan 0 =8/15 what is sin 0
    6·1 answer
  • A jumping spider's movement is modeled by a parabola. The spider makes a single jump from the origin and reaches a maximum heigh
    12·1 answer
  • How do u do this?!?!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!