You survey 72 randomly chosen students about whether they are going to attend the school play. twelve say yes. predict the number of students who attend the school.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of