50 Points, Multiplying Functions Find (first picture)

(second picture)

a. 30

c. 33

b. 6

d. -6

I don't understand these because they always say I'm wrong. So, please put explanations.

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Which function is represented by the graph? a. f(x)=|x-1|+3 b. f(x)=|x+1|-3 c. f(x)=|x-1|-3 d. f(x)=|x+1|+3

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?