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
Korolek [52]
2 years ago
13

Use a system of equations to solve this problem. Dr. Graham currently has two acid solutions. She only has a 60% acid solution a

nd a 20% acid solution in her lab. Dr. Graham needs 30 L of a 50% acid solution to conduct an experiment. How many liters of each solution should she mix together? Let x = the amount of 60% acid solution
Mathematics
1 answer:
Natalka [10]2 years ago
4 0
<span>Dr. Graham currently has two acid solutions.
60% acid AND 20% acid </span>
Dr. Graham needs 30 L of a 50% acid solution
We set up 2 equations in which s = 60% acid and t = 20% acid
A) s + t = 30
B) .60s + .20t = (.50 * 30)
We multiply equation A by -.20
A) = -.20s -.20t = -6 then we add it to B)
B) .60s + .20t = 15
.40s = 9
s = 22.5
t = 7.5
So, she needs to mix 22.5 liters of 60% acid with 7.5 liters of 20% acid.

Source:
http://1728.org/mixture.htm


You might be interested in
Pecahan yang senilai dengan 1/5 adalah
Vilka [71]
I don’t understand the language
7 0
3 years ago
Please help. If f(x)= 2^x-1+3 and g(x)=5x-9 what is (f-g)(x)??
Readme [11.4K]

( f + g ) (x) = –2x + 6

( f – g ) (x) = 8x – 2

( f  × g ) (x) = –15x2 + 2x + 8

<span>\mathbf{\color{purple}{ \left(\small{\dfrac{\mathit{f}}{\mathit{g}}}\right)(\mathit{x}) = \small{\dfrac{3\mathit{x} + 2}{4 - 5\mathit{x}}} }}<span><span>(<span><span>​g</span>​<span>​f</span><span>​​</span></span>)</span>(x)=<span><span>​<span>4−5x</span></span>​<span>​<span>3x+2</span></span><span>​​</span></span></span></span>

4 0
3 years ago
Read 2 more answers
Please help need answer asp
Zanzabum
Since it is a 45-45-90 right triangle, the formula is:
Hypotenuse= sqrt2 * leg
Since you know hypotenuse = 9sqrt2 the leg has to be 9
7 0
3 years ago
Find the reciprocal of 1/5
ivanzaharov [21]

Answer:

Hey! The reciprocal of 1/5 is 5!

Hope this helps :)

~sofia

6 0
3 years ago
Please help I’m so confused
Leya [2.2K]

Answer:

40 {m}^{2}

hope it's helpful ❤❤❤❤❤

THANK YOU.

4 0
3 years ago
Other questions:
  • Circle A has an area of 452.16ft2. With a radius of 12 ft. If circle B has a radius of 17 ft, what is it’s area?
    12·2 answers
  • To convert 58.58 to a fraction, we evaluate 58.58-0.58 What is 58.58-0.58 ?
    13·2 answers
  • Find the center and radius of circle and graph it <br><br> <img src="https://tex.z-dn.net/?f=%28x-4%29%5E%7B2%7D%20%2B%28%20y%20
    15·1 answer
  • I need help, fast! I'll give brainliest whoever answers
    10·1 answer
  • What is the arc of DE ? <br> Please help
    7·2 answers
  • Tell which set or sets the number below belongs to natural numbers, whole numbers, integers, rational numbers, irrational number
    7·1 answer
  • How many modes does the following data set have?<br> 5, 5, 6, 7, 8, 12, 12, 12, 150, 150, 150
    5·2 answers
  • Simplify ((–3)2) to the third power
    12·1 answer
  • Please solve this and only answer with image
    11·1 answer
  • Consider the following regression equation: y = 30 8x. if sse = 960 and ss total = 1,600., then the correlation coefficient is _
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!