Question

Which of the following is not a way to represent the solution of the inequality 2(x + 1) greater than or equal to 20? x greater than or equal to 9 9 less than or equal to x A number line with a closed circle on 9 and shading to the left A number line with a closed circle on 9 and shading to the right

Answer 1

A number line with a closed circle on 9 and shading to the left

Explanation:

we have

`2(x+1)\geq 20`

Solve for x

`2x+2\geq 20`

`2x\geq 20-2`

`2x\geq 18`

`x\geq 18/2`

`x\geq 9`

The solution is the interval ----> [9,∞)

All real numbers greater than or equal to 9

A number line with a closed circle on 9 and shading to the right