Answer:
One notebook costs $2.50
Step-by-step explanation:
Pretty sure it's 5. 5X2=10. Sooo
7 and 14
All real numbers
3(5x - 4) < 15x
~Distribute left side
15x - 12 < 15x
~Subtract 15x to both sides
-12 < 0
Best of Luck!