In a class of 40 students, everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. nine hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 33 hands raised. how many students have piercings both on their ears and their noses?

What is the greatest common factor of 8 and 36

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?