Find the solution using elimination method.

y= ×+6
y=-5×-18

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Ответ:

ellenharley7

18.08.2020

Mathematics

Option B is correct option.

Step-by-step explanation:

We need to solve the inequality: 7 − 9x − (x + 12) less than or equal to 25

$7-9x-(x + 12)\leq 25$

Solving:

$7-9x-(x + 12)\leq 25$

$7-9x-x-12\leq 25$

$-10x-5\leq 25$

Add 5 on both sides:

$-10x\leq 25+5$

$-10x\leq 30$

Divide both sides by -10 and reverse the inequality:

$x\geq -3$

The number line is shown in figure attached.

Option A is correct.

Option B is incorrect because x cannot be less than -3

Option C is correct because −3 less than or equal to x is -3 ≤ can be written as: x≥-3

Option D is correct because when x is greater than or equal to the circle is closed and greater values are on right side of the number line.

So, Option B is correct.

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Find the solution using elimination method.y= ×+6y=-5×-18