Question

Can someone please help me with 83? What is A? full explanation please. Offering lots of points

Answer 1

Answer: A = 5

Explanation:

So, we are given a function, with a point: we can substitute (x,y) from the coordinate into x and f(x) in the function. (recall that f(x) is just a fancy way of saying y).

so:

`-1 = (2(0) + 5)/(0 - A)`

`-1 = (5)/(-A)`, (we can drop the negative sign from both sides here)

`(5)/(5) = (5)/(A)`, (recall 1 = x/x where x is literally any number)

hence we can see that A = 5

Ask questions in the comments if this doesn't make sense :)