Use the substitution method to sloved the systmem of equaions. choose the correct order pair x+y=12 -x=-y-10

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

What is negative 3/9 times negative 2/8 ?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?