Answer:
c.11
Step-by-step explanation:
h + 9 < 20
-9 -9
--------------------
h<20-9
h<11
Answer:
d
Step-by-step explanation:
Answer:
21
Step-by-step explanation:
PEMDAS
1. C. Rectangle
2. F. 160
3. D. Triangular prism
4. H. 30 boxes
5. C. Equilateral Triangle
Measure the sides. And when you get all of the sides add them I'll and get the perimeter I think.