E 6 cm
4 cm
P
6 cm
R
D
F
Which choice could be used in proving that the given triangles are similar?
A)
PO
DE
6
4
B)
PO
EF
4
9
PO
DE
4
6
D)
PR
DE
6
6

answer: 15

step-by-step explanation:

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

2x + 8

step-by-step explanation: