Answer:

Step-by-step explanation:
we have

we know that

substitute

Yes, 90 is 1/10 of 900
Because
90 = 1/10 x 900
90 = 90
You can do it this think and if you can't I will help you
Answer:
315
Step-by-step explanation:
1. This is not a scale rectangle and it angers me.
2. All you have to do is draw proportions.
5x7=35
15x21=315
Youll notice that 5x3=15 and 7x3=21 so it’s just proportions!