Answer:
(a) [tex]x \leq 2.5[/tex]
(b) [tex]x \geq 2[/tex]
Step-by-step explanation:
Solving (a):
[tex]0.4x - 1 \leq 0[/tex]
Add 1 to both sides
[tex]0.4x - 1 + 1\leq 0 + 1[/tex]
[tex]0.4x \leq 1[/tex]
Solve for x
[tex]x \leq 1/0.4[/tex]
[tex]x \leq 2.5[/tex]
Solving (b):
[tex]2.3x \geq 4.6[/tex]
Solve for x
[tex]x \geq 4.6/2.3[/tex]
[tex]x \geq 2[/tex]
