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38 votes
Please help me anyone I need help with this question ​

Please help me anyone I need help with this question ​-example-1
User JEROM JOY
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1 Answer

19 votes
19 votes

Answer:

(d) 2x +y = 8

Explanation:

The answer choices are shown in "standard form," so the comparison to the given equation is easier if it is written in standard form. Add 2x to both sides:

2x +y = 5 . . . . . . given equation in standard form

The other equation in a system with no solution will look like this, but will have a different constant:

2x +y = 8 . . . . . . does not intersect the given equation

_____

Additional comment

All of the other equations shown will intersect the given equation. One way to show this is to use the given equation to substitute for y in the answer choices:

a: 2x -(-2x+5) = 8 ⇒ 6x -5 = 8 . . . one solution: x=13/6

b: x +2(-2x+5) = 8 ⇒ -3x +10 = 8 . . . one solution: x=2/3

c: x -2(-2x+5) = 8 ⇒ 5x -10 = 8 . . . one solution: x=18/5

d: 2x +(-2x+5) = 8 ⇒ 5 = 8 . . . no solution

User Hesky Fisher
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2.6k points