Analysis: For the given system, tell which equation you would first use to solve for a variable in the first step of the substitution method. Explain your choice.
2.5x – 7y = 7.5
6.2 - y = 1

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

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?

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?