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lisov135 [29]
3 years ago
15

Select all correct answers

Mathematics
1 answer:
Sveta_85 [38]3 years ago
3 0

Answer:

1, 2, 4

Step-by-step explanation:

Consider all options:

1. 3x+9y=54

Express y:

9y=54-3x\\ \\y=6-\dfrac{1}{3}x

This is the equation in the form

y=mx+b,

so this is a linear function.

2. y=\dfrac{x}{3}

can be rewritten as

y=\dfrac{1}{3}x+0

This is the equation in the form

y=mx+b,

so this is a linear function.

3. y=x(2x-3)

This function is equivalent to the function

y=2x^2-3x

This is quadratic, not linear function.

4. y=0.4x-2.2

This is the equation in the form

y=mx+b,

so this is a linear function.

5. \dfrac{2}{x}-8=y

This is not linear function, because x is in the denominator.

6. y=\sqrt{4x}

This is not linear function because there is a squer root of x.

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Answer:

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Step-by-step explanation:

Let a be the price of an adult ticket

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Divide by -8

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Now find c

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2(10)+4c=48

20+4c=48

4c=48-20

4c=28

4c/4=28/4

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