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
skad [1K]
3 years ago
10

One antifreeze solution is 20% alcohol. Another antifreeze solution is 12% alcohol. How many liters of each solution should be c

ombined to make 15 L of antifreeze solution that is 18% alcohol?
Mathematics
1 answer:
katrin [286]3 years ago
5 0
Use this systems of equations to solve:

x = first antifreeze
y = second antifreeze

\left \{ {{.2x + .12y = .18(15)} \atop {x + y = 15}} \right.

Isolate y.

x + y = 15
Subtract x from both sides.
y = -x + 15

Substitute y into the other equation.

.2x + .12(-x + 15) = .18(15)
Simplify.
.2x - .12x + 1.8 = 2.7
Subtract 1.8 from both sides.
.08x = .9
Divide both sides by .08
x = 11.25

Substitute x in the equation that we isolated y in.

y = -11.25 + 15
y = 3.75

11.25 L of the first antifreeze and 3.75 L of the second.
You might be interested in
Lakisha is responsible for bringing the desserts to a friend's birthday
galina1969 [7]
Checitgimytgg 4567 friend
8 0
2 years ago
Select all of the following expressions that are equivalent to 16a+40 .
lina2011 [118]
The first one is true
<span>4(4a+10)  is 
</span>16 a + 40 after distribution

The second one is also true
<span>2(8a+20) 
16a + 40 after distribution

Third is not true
</span><span>4a(4+10a) 
</span><span>16a + 40a^2 after distribution

Last one is also true
</span><span>8(2a+5)
16a + 40 after distribution

Hope this helps :)</span>
5 0
3 years ago
24 POINTS!!!!!!!!!!!!!!!!!
podryga [215]
1. Combining like terms
2. Combining

7 0
3 years ago
Read 2 more answers
Which ones have a relationship with functions ​
Anit [1.1K]

Answer:

b. Yes

c. No

d. No

e. Yes

Step-by-step explanation:

hope this helped

7 0
3 years ago
Read 2 more answers
8 more than 3 times a number
IrinaK [193]
3x + 8

Because you do not know the number so it is x
7 0
3 years ago
Other questions:
  • What is 2y^3 when y=4
    6·1 answer
  • WILL GIVE BRAINLIEST!
    10·1 answer
  • Chivis Mexican restaurant pledges 12% of any food purchased on the thrid Wednesday of each month to the cystic fibrosis foundati
    14·1 answer
  • My daughter has as many sisters as she has brothers. Each of her brothers has twice as many sisters as brothers. How many sons a
    15·1 answer
  • 2x + 5y = 16<br> y + 4x = 3
    12·1 answer
  • A solution to a linear inequality is shown below. The solution steps may not all be correct.
    8·1 answer
  • What is 11π/6 in degrees?
    7·2 answers
  • Which equation is a linear function?<br> y=2^x -1<br> y=x/2-5<br> y=2/x +3 <br> y=x^2 +7
    13·1 answer
  • PLEASE ANSWER ASAP
    9·1 answer
  • Amelia, Shauna, Jamie, and Clarence used different approaches to solve this equation.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!