He buyed 240 cards because
20
x
12
-----
40
+
20
-------
240
You divide 18 with 3 and is going to equal 6 so that should be your constant proportionality
Answer:
The answer is2nd point
Step-by-step explanation:

(x^4/3)×(x^2/3) = x^(4/3 + 2/3)
= x²

(x²)^1/3 = x^(2×1/3)
= x^2/3
1/3*3
1
1 is 1/3 of 3 hope that helps
Pretty sure the answer would be 16.
Because 7.6 rounds to 8 and 1.4 would round up to 2. Then you multiply 8 & 2 and get 16.