If 1+1=10 and 5+5=50 what does 19+19=?

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.