A shopkeeper bought two watches at Rs 500.he sold one at loss of 12%and other at the profit of 8%.he neither gained nor loss at this transaction. Find the cost price

Step-by-step explanation:

Let CP of one watch = x

CP of second watch = 500 - x

SP of first watch = (100-12)% of x = 88% of x=0.88x

SP of second watch = (100+8)% of (500 - x) = 108% of (500 - x)

                                  = 1.08*(500 - x) = 1.08*500 - 1.08*x

                                   = 540 - 1.08x

Sp of two watches = 500

0.88x + 540 - 1.08x = 500

-0.20x + 540 = 500

-0.20x = 500 - 540

-0.20x = -40

x = -40/-0.20 = 40*100/20 = 2*100 = 200

CP of first watch = 200

CP of second watch = 500 - 200 = 300

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:

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof