Step-by-step explanation:
1.solution
=2a+5a
=7a
2.solution
=12x-3x
=9x
3.solution
=3p+2p-p
=5p-p
=4p
Hope it helps you.
Answer:
15cm^2
Step-by-step explanation:
since AB is the height and BC is the width you can just multiply them both together, which is 15 cm^2
(It can also the other way around, with AB being the width and BC being the height