4x = 2/5 is the same equation
Multiply 1/4 on both sides to clear the 4.
x = (2/5)(1/4) =2/20= 1/10
CHECK
(1/10)* 4= 4/10 = 2/5
Answer:

Step-by-step explanation:
we know that

so solve for x

Answer:
50.84353551
Step-by-step explanation:
the volume of cone= 1/3 × πr²h
putting the value and calculating,
i get the answer.
Answer:
<u>He sold 80% of the tickets.</u>
Step-by-step explanation:
If you divide 16 and 20, you get 0.8 and multiply that by 100, you get 80%.