Laura made the following observation."The Associative Property of Addition can be used for any expression with 3 terms." Part A: provide an example showing why Laura's observations is correct. Ehat makes this example agree with her observation? Part B:provide an example showing why Laura's observation is not correct. What makes this example show her observation is wrong?

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?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

How many solutions does the nonlinear system of equations graphed below have?