*Urgent* I need help answering this question. Someone please help me, I keep seeing someone type on my questions but they never get answered. Please help thank you!

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.

Asugar cube is inch on each edge. how much volume does it occupy?