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kondaur [170]
3 years ago
8

Is y=2x + 3 proportional or non-proportionalis y=5x proportional or non-proportional

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0

Answer:

y=2x+3 is non-proportional. y=5x is proportional.

Step-by-step explanation:

y=2x+3 is not proportional because there is the +3. also, when it is graphed on a graph, the line does not pass through the origin/zero.

y=5x is proportional because it does not have any other values attached to the y value. when it is graphed, the lie goes through the origin/zero.

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Use the substitution method to solve the given system of equations. Write your answer as an ordered pair, (x, y).
Gnoma [55]

Answer:

(-3, -2)

Step-by-step explanation:

Look at the second equation, we can easily rearrange it to make x the subject.

x - 4y = 5

x = 4y + 5

Now lets put that into the second equation

2x - 2y = -2

2(4y + 5) - 2y = -2

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6y = -12

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Now lets find x!

x = 4y + 5

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x = -3

Now lets format the answer like the question says (ordered pair)

(-3, -2)

Recap: We used substitution and made an equation to work out one of the variables first, then found the second variable using the first.

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Answer:

7 Caterpillars

Step-by-step explanation:

14/2

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3 years ago
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Answer:

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3 years ago
The sum of 5 times a number and <br> minus −​2, plus 7 times a​ number
Olenka [21]

Answer:

12x + 2

Step-by-step explanation:

Let the number be represented by x.

Then five times the number = 5*x

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Adding seven times the number to this expression yields, \[5x+2+7x\]

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So the simplified expression corresponds to 12x + 2.

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