Answer:
9:5
Step-by-step explanation:
You take 10 and divide it by 5 then you get 2
so you take 18 then divide it by 2 and you get 9
Hope this helps :D
Answer:
y=x+15
Step-by-step explanation:
The sum of the three interior angles would be 180°
Hope this helped
Answer:
The probability of no correct answers is 0.125 = 12.5%.
Step-by-step explanation:
For each question, there are only two possible outcomes. Either it is answered correctly, or it is not. The probability of a question being answered correctly is independent of any other question, which means that we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
3 trials, each with probability of success (correct) given by p=0.50.
This means that 
The probability of no correct answers is
This is P(X = 0).


The probability of no correct answers is 0.125 = 12.5%.
Your question just shows periods.