Answer:
substitute x as 3
Step-by-step explanation:
f (3)=2x
=2×3
=6
Answer:

Step-by-step explanation:
Given :

Multiply numerator and denominator by 2 :

[Divide both sides by 5 as it is a common factor]

Answer: doug has 16 cards
Step-by-step explanation: 12+4=16
Give brainliest if it help :)