Answer:
x^2 + x-72=0
Step-by-step explanation:
x(x+1) =72
Distribute
x^2 +x = 72
Subtract 72 from each side
x^2 +x - 72 = 0
Now this is the equation we can factor
The probability of multiple events happening is found by multiplying the probabilities of each event together.

So yes, 1/10 is the answer :)
1 is 4 times greater than 1/4
If you multiply 1/4 by 4 you get 1