Answer:
3a-12c
Step-by-step explanation:
(5a-7c)-(2a+5c)
5a-7c-2a-5c
(5a-2a)+(-7c-5c)
3a-12c
There isnt a picturee but when you add another question I will hep you the best I can :)
Answer:
obtuse angles and right angle
5x^2
6x^3y
2x^3 3xy
^ means the little number above x eg x^3