A ring is now reduced to £840.
This is saving of 40% of the original price of the ring

i think it would be 42cm

47 - 90 = 43

43 - 180 = x

x = 137

the answer is 1/4

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c