9 tens because 10 time 9 is 90 and 2 ones
The perimeter is three times the old.
Because if the formula is
P= a+b+c and you triple each side you get P= 3a+3b+3c so it would be three times as big as the old perimeter.
For example if your equation is
P=3+2+5 (which equals 10) and then you multiply each side by 3 your new formula is P= (3•3) (3•2) (3•5) which equals 30. 30 is three times larger than 10.
Hope this helps!
Answer:
I would say D (3)
Step-by-step explanation:
Im on edge 2020 and I just got it bud
