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Lubov Fominskaja [6]
4 years ago
10

How many solutions does the system of equations have? x - 3y = 15 and 3x - 9y=45

Mathematics
1 answer:
pantera1 [17]4 years ago
8 0
For the answer to the question above asking how many solutions does the system of equations have? y - 6x = -3 and 4y - 24x = -16. The answer is y - 6x = -3 -6x + y = -3 6x - y = 3 
 4y - 24x = -16 -24x + 4y = -16 24x - 4y = 16 reduces to 6x - y = 4 
and this has no solutions
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What is the difference? 5/3-1/2<br><br>A. 4<br>B. 7<br>C. 7/6<br>D. 7/0 = undefined
Fofino [41]
The answer is:  [C]:  " ⁷/₆ " .
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  Note:
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   (5/3) - (1/2) = ? ;
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The LCD (lowest common denominator) of "2 and 3" is "6" ;

So we need to rewrite EACH fraction in the problem as a fraction with "6" in the denominator ;
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 (5/3) = (?/6) ?  ;  (6÷3=2) ;  (5/3) = (5*2)/(3*2) = 10/6 ;
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(1/2) = (?/6) ? ; (6÷2=3) ;  (1/2) = (1*3)/(2*3) = 3/6 ;
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Rewrite the problem:   "    (5/3) - (1/2) " ;  as:
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   10/6 - 3/6  ;
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    10/6 - 3/6 = (10 - 3) / 6 = (7/6) = 1 ⅙ .
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The answer is:  " ⁷/₆ " ;  or, write as:   " 1 ⅙ " ; which corresponds to: 
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Answer choice:  [C]:  " ⁷/₆ " .
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5 0
3 years ago
A problem states: "There are 5 more girls than boys at the party. There are 27 children at the party in all. How many boys are t
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27-5 = 22

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there are 11 boys at the party

expression = b+5

6 0
3 years ago
Read 2 more answers
7.6x = 64 is approximately 3.05.<br> is this the solution?
lisov135 [29]
7.6x = 64
x = 64/7.6
x = <span> <span> <span> 8.4210526316 </span> </span> </span>
So, 3.05 is NOT the solution

3 0
3 years ago
Ericka decided to compare her observation to the average annual trend, which shows the water rising 1.8 mm/year. Remember, she u
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Answer:

Sample response:

Step-by-step explanation:

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7 0
3 years ago
Please anyone help me The measure of an angle is five times the measure of its supplementary angle. What is the measure of each
Radda [10]

Answer:

150 and 30

Step-by-step explanation:

Hello!

Supplementary angles are angles that when added up equal 180

Which can be shown by

x + x = 180

Since one has to be 5 times bigger we put a 5 in front of one of the x's

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Now we solve for x

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Combine like terms

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Divide by 6

x = 30

Now we put that into each angle

5(30) = 150

30

The answer is 150 and 30

Hope this Helps!

5 0
4 years ago
Read 2 more answers
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