3 years ago

Solve two step equations 18=-1/2x-7

Mathematics

1 answer:

lana66690 [7]3 years ago

7 0

Answer:

X=-50

Step-by-step explanation:

18=-1/2x-7

-1/2x=18+7...... this is first step

X=25/(-1/2)...... the 2nd step

X=-50

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gogolik [260]

Answer:

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2 years ago

Does the table show a direct proportional relationship? If so, what is the constant of proportionality?

lesantik [10]

Answer:

C. Yes, 3.5.

Step-by-step explanation:

If there is a relationship of direct proportionality for every ordered pair of the table, then the constant of proportionality must the same for every ordered pair. The constant of proportionality ( $k$ ) is described by the following expression:

$k = \frac{y}{x}$ (1)

Where:

$x$ - Input.

$y$ - Output.

If we know that $(x_{1}, y_{1}) = (13, 45.5)$ , $(x_{2}, y_{2}) = (14, 49)$ and $(x_{3}, y_{3}) = (15, 52.5)$ , then the constants of proportionalities of each ordered pair are, respectively: