Y= –x + 4 x + 2y = –8 how many solutions does this linear system have?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

The collection of beautiful oil paintings currently on display at an art gallery well defined; set not well defined; not a set

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.