Answer:
7
Step-by-step explanation:
7^2 =49
49 -21 =28
28÷7 = 4
Try going through the formula which is 2 pi r
so 2*3.14*7
Answer:
None?
Step-by-step explanation:
After using the 4 answers using what I think is (x,y,z) none of the answers were true.
Let
x--------> original length side of a square
we know that
area rectangle=length*width
area=126 in²
length=(x+8)
width=(x-3)
so
126=(x+8)*(x-3)------> x²-3x+8x-24=126----> x²+5x-150=0
using a graph tool------> to resolve the second order equation
see the attached figure
the solution is
x=10 in
the answer isthe original length side of a square is 10 in