Can someone explain or help me with these problems
Please and thank you



Answer:
1st picture (tri) = 16y+8
2nd picture (tri) = 12x-9
3rd picture (sq) = 21x+35
Step-by-step explanation:
Triangle area = (Base x Height) divided by 2
#1.) 16(2y+1) = 32y + 16 (32y+16)/2 = 16y+8
If you need more explination ask me :)