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3 years ago

Is this proportional or not

Mathematics

1 answer:

fredd [130]3 years ago

3 0

9514 1404 393

Answer:

NOT a proportional relationship

Step-by-step explanation:

A proportional relationship graphs as a straight line through the origin. The line here does not go through (0, 0), so the relationship IS NOT proportional.

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Factor to find the zeros of the function defined by the quadratic expression. 2x2 − 18x + 36 A) x = 3 or x = 6 B) x = 3 or x = −

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Answer:

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Step-by-step explanation:

Factor out the GCF : 2(x^2-9x+18)

Then, set to zero.

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Are the equations 2x - y = - 4 and 3x + y = -1 dependent, independent or neither

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Answer:

From the above calculations, it is clear that the consistent system has exactly one solution i.e. x = -1, y =2, therefore, it is independent.

Step-by-step explanation:

Given the system of equations

$\begin{bmatrix}2x-y=-4\\ 3x+y=-1\end{bmatrix}$

$\mathrm{Multiply\:}2x-y=-4\mathrm{\:by\:}3\:\mathrm{:}\:\quad \:6x-3y=-12$

$\mathrm{Multiply\:}3x+y=-1\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:6x+2y=-2$

$\begin{bmatrix}6x-3y=-12\\ 6x+2y=-2\end{bmatrix}$

$6x+2y=-2$

$-$

$\underline{6x-3y=-12}$

$5y=10$

so the system of equations becomes

$\begin{bmatrix}6x-3y=-12\\ 5y=10\end{bmatrix}$

solving 5y = 10 for y

$5y=10$

Divide both sides by 5

$\frac{5y}{5}=\frac{10}{5}$

simplify

$y=2$

$\mathrm{For\:}6x-3y=-12\mathrm{\:plug\:in\:}y=2$

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$6x-6=-12$

Adding 6 to both sides

$6x-6+6=-12+6$

$6x=-6$

Divide both sides by 6

$\frac{6x}{6}=\frac{-6}{6}$

$x=-1$

Therefore, the solution to the system of equations be:

$x=-1,\:y=2$

From the above calculations, it is clear that the consistent system has exactly one solution i.e. x = -1, y =2, therefore, it is independent.

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