-1 as a negative would = X
Formula for the area of a circle is Pi*radius squared
So, we do Pi*2^2 which is 12.57
It's the decimals but you did a reciprocal
For first is B For second is C::::)
Distribute the 2 to get the pink box
10x + 2y = 18
Then if we are subtracting the bottom equation from the pink box
10x + 2y = 18
-(10x -7y = -18)
9y = 36
y = 4
