Find the value of x for both problems.​

Find an equation of the line perpendicular to the graph.

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)