Simplify the expression by combining like terms. 15+12−5+4−7

There are 12 boy and13 girls in a class. if the teacher randomly chooses a student’s name out of a hat what is the probability it will be a girl

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq