The vertices of a triangle are a(7, 5), b(4, 2), and c(9, 2). what is m`/_abc`?

So first you have to know the distance between those three points:

AB= √18

BC= 5

AC=√13

Then use Trigonometric function to find m/_ABC:

CosB=(a^2+c^2-b^2)/2ac

cosB={(√18)^2+(√13)^2-5^2}/2√18√13

The Answer should be m/_ABC=30

answer: ok

step-by-step explanation:

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: