Answer:
12
Step-by-step explanation:
gradient =y2-y1÷x2-x1
=10-5÷2-(-3)
1
y-y1=m(x-x1)
y-5=1(x-(-3))
y=x+2
3
Square: 4 equal sides
If x is one of the sides:
Perimeter: 4x
12: 4x
x=3
