The answer is 3. This is because the perimeter is 30 so 5x+5x+x-3+x-3 = 30. Thus you have 12x-6=30 so x = 3
50/50
With a two-sided coin, the probability of it landing on heads or tails will always be 50.
x^2 - 49 = 0
Add 49 to both sides:
x^2 = 49
Take the square root of both sides:
X = 7
The answer is 3.800 because you round up
