-11+x=9
Given the above equation, what is the value of 20-(11-x)=?

Abag contains 3 blue and 2 green marbles. what is the probability of drawing a blue marble followed by a green marble, without replacing the first marble?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25