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Please help me! Read the screenshots and give a detailed answer pls, I honestly have tried this problem like 4 times and still can't get it right. 100 points and brianly to the best answer <3

Please Help Me Read The Screenshots And Give A Detailed Answer Pls I Honestly Have Tried This Problem Like 4 Times And Still Cant Get It Right 100 Points And Br class=
Please Help Me Read The Screenshots And Give A Detailed Answer Pls I Honestly Have Tried This Problem Like 4 Times And Still Cant Get It Right 100 Points And Br class=
Please Help Me Read The Screenshots And Give A Detailed Answer Pls I Honestly Have Tried This Problem Like 4 Times And Still Cant Get It Right 100 Points And Br class=

Sagot :

Answer:

2.

(X1×X2)/(X1+X2);(Y1×Y2)/(Y1+Y2)

(-3x9)/(-3+9);(7x-1)/(7+-1)

=use calculator