The answer is 2:3 because it is 12:18 simplified.
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Answer:
4mn/(3m+12)
Step-by-step explanation:
It is often helpful to factor expressions so that common factors can cancel.

Answer:
Positive
Step-by-step explanation:
A negative divided by a negative can cancel out to make a positive. So,
.
I hope this helps!
Answer:
1 : 4 : 9
Step-by-step explanation:
Given the ratio of diameters = a : b , then
ratio of areas = a² : b²
Here ratio of diameters = 1 : 2 : 3 , so
ratio of areas = 1² : 2² : 3² = 1 : 4 : 9