Wvaries jointly as x and y and inversely as the square of z. if w=280 when x=30, y=12, and z=3, find w when x=20, y=10 and z=2

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

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?