Answer:
no solution
Step-by-step explanation: because if it has no variables that are the same it has no solution.
4th one. its simple math bro
I don't understand the English. I would've loved to help though.
(x-h)²+(y-k)²=r² is the equation of a circle with radius of r
so if x-h=4 and y-k=3 then
4²+3²=r²
16+9=r²
25=r²
sqrt both sides
5=r
radius is 5 units