Question

Solve: 8b + 20 ≥ 5b – 10.
A. b ≤ 10/3
B. b ≤ 10
C. b ≥ -10
D. b ≥ -10/3

Answer 1

d

Answer 2

D is incorrect.

\[8b+20\ge 5b-10\]Subtract \(5b\) from each side:
\[8b-5b+20\ge 5b-5b-10\]\[3b+20\ge -10\]Subtract 20 from each side:\[3b+20-20\ge-10-20\]\[3b\ge-30\]Now divide both sides by 3. What do you get?