I think it’s x = 9 hope it helps :D
Answer:
d < - 7
Step-by-step explanation:
given
42 < - 6d ( divide both sides by - 6 )
Remembering to reverse the inequality symbol as a consequence
- 7 > d ⇒ d < - 7
Assuming the highest score for a test is 100.
Highest possible total scores for 4 tests = 71 + 78 + 81 + 100 = 330
Highest possible average score for 4 tests = 330 ÷ 4 = 82.5
Answer: 82.5
F(3): 6-3(3)=6-9=-3
f(-3): 6-3(-3)=6-(-9)=6+9=15
-3+15=12
