SERIOUSLY DOES REAL PPL USE THIS APP PLS ANSWER Which coordinates have to be different and which could be the same in
a list of ordered pairs that is a function?

the x-coordinates have to be different, and the y-coordinates can be the same. if there were two points on a graph that had the same x-coordinate, the two points would be on top of each other at different y-values, preventing the graph from passing the vertical line test. if a graph passes the vertical line test, it is a function.

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4