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Sergio [31]
3 years ago
15

Write an equation of the direct variation that includes the point (9, –12).

Mathematics
1 answer:
Crank3 years ago
5 0
For direct variation:
y = kx
-12 = 9k
k = -12/9 = -4/3
Therefore, the required equation is y = -4/3 x
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You are being asked to compare various expressions to the given one, and to determine which are equivalent and which are not. You are asked to simplify the given expression—collect terms.

The given expression ...

... 4y -8x² -5 +14x² +y -1

can be simplified by identifying like terms and adding their coefficients.

... y(4 +1) +x²(-8 +14) +(-5 -1)

... = 5y +6x² -6 . . . . . simplified form

Any expression that has a different y-term, a different x² term, or a different constant term is <em>not equivalent</em>.

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