Write an inequality for the situation. all real numbers y that are less than 4 or greater than 9

a. y ≤ 4 or y ≥ 9

b. 4 < y < 9

c. y < 4 or y > 9

d. y < 9 or y > 4

Hello mate!

The notation:

a < b

means that the number b is bigger than the number a, and the notation:

a ≤ b  

means that the number b is bigger or equal than the number a.

"all real numbers y that are less than 4"

this is written as:

y < 4

"all real numbers that are greater than 9"

this is written as:

y > 9

then, the situation can be written as:

y <4 and y >9, which means that the right answer is option C.

step-by-step explanation:

it's 15