9
algebra

If 4x+854\frac{4x + 8}{5} \leq 4, what is the greatest integer value of xx?

A

22

B

33

C

44

D

55

Correct Answer: B

Choice B is the correct answer. Finding maximum integer values requires solving and identifying boundaries.

  1. Multiply by 5: 54x+85545 \cdot \frac{4x+8}{5} \leq 5 \cdot 4, giving 4x+8204x + 8 \leq 20
  2. Subtract 8: 4x124x \leq 12
  3. Divide by 4: x3x \leq 3
  4. Greatest integer: Since x3x \leq 3, maximum is exactly 3

?�� Strategic Tip: For \leq inequalities, the boundary value itself is included in the solution set.

Choice A is incorrect because while x=2x = 2 satisfies the inequality, it's not the GREATEST integer. Choice C is incorrect becausex=4x = 4 does not satisfy x3x \leq 3 (4 is greater than 3). Choice D is incorrect becausex=5x = 5 exceeds the solution range.