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Alexeev081 [22]
2 years ago
6

Find each graph, find (a) AB to the nearest tenth and (b) the coordinates of the midpoint of AB.

Mathematics
1 answer:
Rufina [12.5K]2 years ago
8 0

Answer: AB≈10,8,  C(-1;0,5).

Step-by-step explanation:

4.

(-2,-2)\ \ \ \ (8,-6)\ \ \ \  \overline {AB}=?\\

                     Equation of a straight line

                  \boxed {\overline {AB}=\sqrt{(x_B+x_A)^2+(y_B-y_A)^2} }

x_A=-2\ \ \ \  x_B=8\ \ \ \ y_A=-2\ \ \ \ \ y_B=-6\\\\\overline{AB}=\sqrt{(8-(-2))^2+(-6-(-2))^2} \\\\\overline{AB}=\sqrt{(8+2)^2+(-6+2)^2} \\\\\overline{AB}=\sqrt{10^2+(-4)^2} \\\\\overline{AB}=\sqrt{100+16} \\\\\overline{AB}=\sqrt{116} \\\\\overline{AB}\approx10,8.

5.

(-2,-2)\ \ \ \ (0,3)\ \ \ \ the\  midpoint\ C\  of\ AB=?\\

                                 Line Midpoint Equation

                           \boxed {C_x=\frac{X_A+X_B}{2} }}\ \ \   \boxed {C_y=\frac{Y_A+Y_B}{2} }

X_A=-2\ \ \ \ \ X_B=0\ \ \ \ \ Y_A==-2\ \ \ \ Y_B=3\\\\C_x=\frac{-2+0}{2} \\\\C_x=\frac{-2}{2} \\\\C_x=-1.\\\\C_y=\frac{-2+3}{2}\\\\C_y=\frac{1}{2}\\\\ C_y=0,5.\\\\Hence,\ \ \  \ C_{AB}(-1;0,5).

                                   

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