Moosa's sister is six years younger than 3 times his age. The sum of their ages is 30. How old is Moosa?

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

{0,1,2,3,4,5,6,20,21,22,23,24,25} the distribution is considered to be: skewed the right, skewed the left, not skewed?

Can some one me with these questions