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Irina18 [472]
3 years ago
14

If you were to solve the following system by substitution, what would be the best variable to solve for and from what equation?

Mathematics
1 answer:
VashaNatasha [74]3 years ago
7 0

Answer: B. x, in the second equation

Step-by-step explanation:

The given system :

2x+6y=9...................(1)\\\\3x-12y=15.........................(2)

To apply the substitution method , first we need to select the best variable and  a equation which is easy to simplify.

From the given system equation (2) have all the numbers which are multiples of 3.

Then we divide 3 on both sides of equation (2), we get

x-4y=5\\\\\Rightarrow\ x=4y+5

Therefore, the best variable to solve for and from what equation is x, in the second equation.

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Please help if you want brianleist!! :) uhm don't mind update- NO LINkS child..
Katen [24]

Answer:

5/8

Step-by-step explanation:

total is 16

and point is on 10th line

therefore 10/16 is equals to 5/8

8 0
3 years ago
Read 2 more answers
The function f(x) varies inversely with x and f(x)=2 when x = 16.<br><br> What is f(x) when x = 4?
andrew-mc [135]

Answer: The correct answer is:  [D]:  "8" .

Step-by-step explanation:f y varies inversely with x;  then y = k/x ; with "k" being the "constant" in this equation.  

You can find the constant by substituting the values given: x = 16,  f(x) = y = 2 ;

So, f(x) = y = 2  = k/16 ;

→  2 = k / 16 ;

Solve for the constant; "k" ;

Multiply EACH SIDE of the equation by "16"

→  16* (2) = (k / 16) * 16 ;

→  32 = k ;

 ↔  k = 32 ;  

As such, we can write the equation:

y = k/ x ; as:

→  y = 32/ x ;

Since we are given:  "x = 4" ;  Plug in that value; and solve for "y" ;

y = 32/4 = 8 .

y = 8 .

y = f(x) ;

So;  f(x) = 8 ;  which is:  Answer choice:  [D]:  "8" .

8 0
3 years ago
4/18 is closest to: 1/2 or 1 whole
Anika [276]

Answer:

1/2, since 1 whole is 18/18 and 1/2 is equal to 9/18

Step-by-step explanation:

3 0
3 years ago
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What is 1856.4÷5.2? pls help me!
kaheart [24]
The answer is 357 hope it helped
8 0
3 years ago
Can anybody help me pleasee I don't understandd
o-na [289]
Hello there.

6(8 - 2y) = 4y

To solve for this, we need to apply the Distributive Property to the left side of the equation. This property allows us to multiply the number outside of the parenthesis by all numbers inside of the parenthesis.

6(8 - 2y)
6(8) + 6(-2y)
48 - 12y

Now, let’s take a look at our equation.

-12y + 48 = 4y

To make things more simple, we’ll add 12y to both sides of the equation. This will cancel out -12y on the left side of the equation and will turn 4y on the right side of the equation into 16y.

Our new equation is:

16y = 48

Now all we need to do is divide both sides by 16 to solve for y.

16y / 16 = y
48 / 16 = 3

Our final answer and solution is:

Y = 3

I hope this helps!
4 0
3 years ago
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