Question

Determine the solution and indicate the restrictions on the variable.

Answer 1

B

Explanation:

Subtract 20 from both sides:

`-√(9-8x) =-15`

Divide both sides by -1:

`√(9-8x) =15`

Square both sides:

`9-8x=255`

Subtract 9 by both sides:

`-8x=216`

Divide both sides by -8:

`x=-27`

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B