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Olegator [25]
3 years ago
14

An automobile's radiator has a capacity of fifteen quarts, and it currently contains twelve quarts of a thirty percent antifreez

e solution. How many quarts of pure antifreeze must be added to strengthen the solution to forty percent?
Mathematics
2 answers:
sammy [17]3 years ago
7 0

2 quarts is your answer

(I had the same question)

xoxo <3 xoxo

<u>Stay Home</u>, <u>Stay Safe</u>, Help STOP <u>Coronavirus</u> :)

Paha777 [63]3 years ago
4 0
[12(.3)+x(1)]/(12+x)=.4

3.6+x=4.8+.4x

.6x=1.2

x=2 qts

(though your radiator would still be short a quart for doing so :) )
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The answer is:  " 60° " .
__________________________________________________________
     " m∠A = 60° " .
__________________________________________________________
Explanation:
__________________________________________________________

Note:  All triangles, by definition, have 3 (three) sides and 3 (three angles).

The triangle shown (in the "image attached") has three EQUAL side lengths.   Therefore, the triangle shown is an "equilateral triangle" and has 3 (three) equal angles, as well.

All triangles by, definition, have 3 (three) angles that add up to "180° " .

Since each of the 3 (three) angles is equal;  and the three angles are:  

  "∠A" , "∠B" , and "∠C" ;

We can find the measure of "∠A" ; denoted as:  "m∠A" ; as follows:
______________________________________________________
    m∠A  = 180° ÷ 3 = 60° .
______________________________________________________
The answer is:  " 60° " .
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   m∠A = " 60° " .
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