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
sesenic [268]
3 years ago
8

A radiator contains 10 quarts of fluid, 30% of which is antifreeze. How much fluid should be drained and replaced with pure anti

freeze so that the new mixture is 40% antifreeze?
Mathematics
1 answer:
babymother [125]3 years ago
8 0

Answer:

1 3/7 quarts should be drained off and replaced with pure antifreeze.

1 3/7 ≈ 1.4286

Current amount of antifreeze in quarts is -

30/ 100 × 10 = 3

40% ---> 4 quarts

Let the amount drained of and replaced with antifreeze be x-

The amount left after draining off is 10 − x.

The amount of antifreeze  is 30/ 100 (10−x).

30/100(10-x)+x=4

3-3/10x+x=4

3+x(1-3/10)=4

x=1*10/7=1 3/7 quarts

check;

10- 1 3/7 = 8 4/7

=(30/100*8 4/7)+1 3/7

=(3/10 * 60/7) + 10/7

=3*6/7 + 10/7

=28/7

=4

4 liters of pure antifreeze is mixed into 10 quarts.

You might be interested in
1. What is the value of the expression f2 + 5 if f = 3?<br> A. 8<br> B. 2<br> C. 6<br> D. 14
zaharov [31]

Option D: 14 is the right answer

Step-by-step explanation:

In order to find the value of given expression we have to put the given value for f in the expression

Given expression is:

f^2+5

We have to find the value of expression on f=3

So,

putting f=3 in expression

= (3)^2+5\\= 9+5\\=14

The value of given expression at f=3 is 14

Hence,

Option D: 14 is the right answer

Keywords: expressions, variables

Learn more about expressions at:

  • brainly.com/question/10364988
  • brainly.com/question/10435816

#LearnwithBrainly

8 0
3 years ago
- Javid bought 3 pairs of Nike Jordan True Flight sneakers
Tanya [424]

Answer:

a b c or d is the answer

Step-by-step explanation:

no explanation

8 0
2 years ago
Find Dy/dX when x^y×y^x=1​
victus00 [196]

by dy/dx, we'll be assuming that "y" is encapsulating a function, a function in terms of "x".

x^y\cdot y^x=1\implies \stackrel{\textit{\large product rule}}{\stackrel{\textit{chain rule}}{yx^{y-1}(1)}\cdot y^x+x^y\cdot \stackrel{\textit{chain rule}}{xy^{x-1}\cdot \frac{dy}{dx}}}~~ = ~~0 \\\\\\ y^{1+x}x^{y-1}+x^{y+1}y^{x-1}\cdot \cfrac{dy}{dx}=0\implies \cfrac{dy}{dx}=\cfrac{-y^{1+x}x^{y-1}}{x^{y+1}y^{x-1}} \\\\\\ \cfrac{dy}{dx}=-~~ y^{(1+x)-(x-1)}~~x^{(y-1)-(y+1)} \\\\\\ \cfrac{dy}{dx}=-~~ y^2x^{-2}\implies \cfrac{dy}{dx}=\cfrac{-y^2}{x^2}

7 0
2 years ago
Please help me!!!!! :)
dsp73
To find the volume,we would first need to find the height of square pyramid, by it's base edge and slant height using Pythagoras theorem:

{height }^{2}  = {13}^{2}  -  {10}^{2}  \\ {height }^{2}  = 69 \\ height =   \sqrt{69}

We can then use the pyramid formula to find the volume:
base \:  \times  \: height \:  \times  \frac{1}{3}

In this case,the volume will be:

10×_/69×1/3
=27.68874...
≈27.7 units^3

Hope it helps!
5 0
3 years ago
Professor Easy's final examination has 9 true-false questions followed by 3 multiple-choice questions. In each of the multiple-c
trapecia [35]

Answer:    2⁹5³ = 64,000

<u>Step-by-step explanation:</u>

There are 9 questions with 2 options (true or false) = 2⁹

There are 3 multiple questions with 5 options = 5³

true/false questions AND multiple choice questions

                  2⁹               x                5³                            = 2⁹5³

4 0
3 years ago
Other questions:
  • Select the correct answer from the drop-down menu.
    15·2 answers
  • Tell me what the "d," presents in the given formula:<br> A=<br> dd.
    10·1 answer
  • What is the type of sweet wine made in tuscany using dried grapes and extensive aging?
    10·1 answer
  • (1,3),(2,6),(3,9),(4,12)
    13·2 answers
  • Congruent triangles are always similar
    5·1 answer
  • Mumbi is approximately 845 kilometers away from Bangalore, and Mumbai is approximately 1160 km away from Delhi. The distances, m
    10·2 answers
  • What fraction is half way between 1/4 and 1/2
    12·2 answers
  • 6.
    8·1 answer
  • Use the side-splitter theorem to solve for x in the triangle below.
    7·1 answer
  • Help pleaseee mathhhhhh
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!