Solve the simultaneous equations
3x-y=18
2x+y=7
answer x=
y=

What is the square root of 45? (step by step working plz)

5(-9w) put expression in distributive property

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?