Question

2.7 ≤ b + 5
a. b ≥ 7.7
b. b ≥ –2.3
c. b ≤ 2.3
d. b ≤ –7.7

Answer 1

2.7 ≤ b+5 subtract both sides by 5 to get
2.7-5≤b+5-5
-2.3≤b reading from right to left we can see that
b>= -2.3 ...(b) ans

Answer 2

ALTERNATE SOL.
2.7 ≤ b+5 subtract both sides by 5 to get
2.7-5≤b+5-5
-2.3≤b add 2.3 on both sides,, and subtracting 5 on both sides gives
-2.3+2.3-b≤b-b+2.3 gives
-b≤+2.3 now multiplying both sides by -1 (rule is change sign from < to >)
b>=- 2.3 ans...