Question

What is the solution for this inequality?

5x < 45
A.
x > -9
B.
x < 9
C.
x < -9
D.
x > 9

Answer 1

Answer: your awnser will be letter B.

Explanation:

Answer 2

The answer is B.
`x<9`

Explanation:

In order to determine the answer, we have to solve for x, that is, we have to free the "x" variable. Then we have to graph the inequality to see better the solution.

Solving for x:

`5x<45\\x<(45)/(5)\\x<9`

I have attached an image that shows the graph of the inequality. The red region is the solution for the inequality.

Also, to check the solution, we can test some numbers in the inequality:

for x=8

`5*8<45\\40<45`

Ok

for x=10

`5*10<45\\50<45`

Wrong

Finally, the answer is letter B.
`x<9`