What is the slope of the line that contains these points?
X -7 -6 -5 -4
y 21 17 13 9

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

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