1) acknowledge the rule that anything that’s outside of the bracket applies to EVERYTHING inside of the bracket
2)apply the rule: (A-6)^2
Answer:
28 cm
Step-by-step explanation:
Triangle ABC is obtained by joining the mid points of the sides of triangle XYZ.
So, perimeter of triangle ABC will be equal to half of the perimeter of triangle XYZ.

Boys to girls is 4:5.......added = 9
so 4/9 are boys and 5/9 are girls
The subtrahend is 9 and the difference is 8 and the minuend is 17