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bogdanovich [222]
3 years ago
5

I need help plz 99 points waiting for the person that answers the question

Mathematics
2 answers:
amid [387]3 years ago
4 0

Answer:

No

Step-by-step explanation:

This is from a website so you might have to rephrase it but Direct variation describes a simple relationship between two variables . We say y varies directly with x (or as x , in some textbooks) if:

y=kx

for some constant k , called the constant of variation or constant of proportionality . (Some textbooks describe direct variation by saying " y varies directly as x ", " y varies proportionally as x ", or " y is directly proportional to x .")

This means that as x increases, y increases and as x decreases, y decreases—and that the ratio between them always stays the same.

The graph of the direct variation equation is a straight line through the origin.

ddd [48]3 years ago
3 0
Any line that crosses through the origin is a direct variation:
y = kx y = kx y = kx
The graph you're looking at isn't a straight line. We can demonstrate this by demonstrating that the slopes of two pairs of points are not equal.
m = (4 - 0) / m = y/x (2 - 0)
m = 2 m = y/x m = (9 - 0) / (3 - 0) m = 3 m = 2 m = 3
As a result, this isn't a direct version.
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C.    y = |x + 2| – 3

Step-by-step explanation:

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When Zack checked his solution, it didn’t work. What was his mistake?
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6x+3/x^2-4*x^2+7x+6/2x^2+3x+1<br> please help
kvasek [131]

Answer:

Step-by-step explanation:

STEP

1

:

Equation at the end of step 1

 

STEP

2

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Equation at the end of step

2

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STEP

3

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           2x3 - x2 - 6x

Simplify   —————————————

           2x2 - 7x + 6

STEP

4

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Pulling out like terms

4.1     Pull out like factors :

  2x3 - x2 - 6x  =   x • (2x2 - x - 6)

Trying to factor by splitting the middle term

4.2     Factoring  2x2 - x - 6

The first term is,  2x2  its coefficient is  2 .

The middle term is,  -x  its coefficient is  -1 .

The last term, "the constant", is  -6

Step-1 : Multiply the coefficient of the first term by the constant   2 • -6 = -12

Step-2 : Find two factors of  -12  whose sum equals the coefficient of the middle term, which is   -1 .

     -12    +    1    =    -11

     -6    +    2    =    -4

     -4    +    3    =    -1    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -4  and  3

                    2x2 - 4x + 3x - 6

Step-4 : Add up the first 2 terms, pulling out like factors :

                   2x • (x-2)

             Add up the last 2 terms, pulling out common factors :

                   3 • (x-2)

Step-5 : Add up the four terms of step 4 :

                   (2x+3)  •  (x-2)

            Which is the desired factorization

Trying to factor by splitting the middle term

4.3     Factoring  2x2-7x+6

The first term is,  2x2  its coefficient is  2 .

The middle term is,  -7x  its coefficient is  -7 .

The last term, "the constant", is  +6

Step-1 : Multiply the coefficient of the first term by the constant   2 • 6 = 12

Step-2 : Find two factors of  12  whose sum equals the coefficient of the middle term, which is   -7 .

     -12    +    -1    =    -13

     -6    +    -2    =    -8

     -4    +    -3    =    -7    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -4  and  -3

                    2x2 - 4x - 3x - 6

Step-4 : Add up the first 2 terms, pulling out like factors :

                   2x • (x-2)

             Add up the last 2 terms, pulling out common factors :

                   3 • (x-2)

Step-5 : Add up the four terms of step 4 :

                   (2x-3)  •  (x-2)

            Which is the desired factorization

Canceling Out :

4.4    Cancel out  (x-2)  which appears on both sides of the fraction line.

Final result :

 x • (2x + 3)

 ————————————

    2x - 3  

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Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of

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