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2 years ago

2y + x + 7 = 0 how do i solve with substitution?

Mathematics

2 answers:

Jlenok [28]2 years ago

6 0

Answer:

x+2y=-7

Step-by-step explanation:

2y + x =-7

x+2y=-7

Vlada [557]2 years ago

3 0

When solving for x, set y to 0. When solving for y, set x to zero. You can just isolate the variables from there.

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3 years ago

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3 years ago

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borishaifa [10]

Answer: $x+y\geq 1$ , $x>\frac{1}{4}$ , $x\geq 2y$ and $y\geq 0$

Step-by-step explanation:

Here, x represents the number of hours Zoe spent running on her wheel and y represents the number of hours spent scratching her cage.

Julie was awoke for at least an hour running on her exercise wheel and scratching the of her cage.

⇒ $x+y\geq 1$

She ran on her wheel at least twice as long as she scratched at the corners of her cage.

⇒ $x\geq 2y$

Also, She spent more than 1/4 hour running on her wheel.

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And, we know that number of hours can not be negative.

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Therefore, the complete system of inequality which shows the given situation is,

$x+y\geq 1$ , $x>\frac{1}{4}$ and $x\geq 2y$ , $y\geq 0$

Note: the feasible region ( covered by the given system) is shown in the below graph.

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3 years ago