Answer:
160
Step-by-step explanation:
If out of 30 7th graders, 12 own a dog then when you have 400 of them, 160 will have a dog as well.
The way I did this was by 400/30: which was 13.3 repeating. I then mutliplied this number by 12, to find the final answer of 160.
proportion: 12/30 = 0.4
0.4 × 400
7.77 7.78 7.8 7.87 7.88
4/9
she bought 5 berries in total
3+2=5
2(2x+5)
Length of the rectangle=l= 3x
Breadth of the rectangle=b= 5
Perimeter= 2(l+b)
= 2(3x+5)