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3 years ago

Determine whether y varies directly with x. If so, find the constant of variation and write the equation.

Mathematics

1 answer:

kotykmax [81]3 years ago

6 0

Answer: B. No

Step-by-step explanation:

Direct variation has the following form:

$y=kx$

Where the constant of variation is "k".

By definition, in direct variation, when the variable "x" changes, tha variable "y" changes in proportion to the variable "x".

As you can observe in the table, when the value of the variable "x" increase, the values of the variable "y" decrease, therefore we can conclude that it is not a direct variation.

Then the answer is the option B.

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Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance

Rina8888 [55]

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1) On the left side of the balanced beam you can see 3 triangles and 5 squares. The weight on left side is 3·x+5·1=3x+5 units.

2) On the right side of the balanced beam you can see 2 triangles and 7 squares. The weight on right side is 2·x+7·1=2x+7 units.

3) If the whole system is balanced, then the weights on left and right sides are equal:

3x+5=2x+7.

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3 years ago

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Misha Larkins [42]

Answer:

Step-by-step explanation:

-4-(-12)

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3 years ago

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Fantom [35]

Answer: j = -0.45

Step-by-step explanation:

2.25 – 11j – 7.75 +1.5j = 0.5j – 1

We can group similar terms:

-11j +1.5j -0.5j = -1 - 2.25 + 7.75

-10j = 4.5

j = 4.5/-10

j = -0.45

Answer: j = -0.45

<h2><em>Spymore</em></h2>

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3 years ago

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Fittoniya [83]

Answer:

Step-by-step explanation:

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3 years ago

Ratio as a reduced form for 250 to 1,000?

hoa [83]

250:1000
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