Step-by-step explanation:
i) 

ii) 
iii) 

Answer: d) x+y =40
x=2y -11
Step-by-step explanation:
The seamstress will need 12 inches of special fabric.
Answer:
V= 18.75 cm^3
Step-by-step explanation:
- The formula for finding the volume for <em>any</em> given shape is V = L x W x H.
- So, multiply 2 1/2 cm x 2 1/2 cm x 3 cm.
- This gives you 18.75 cm^3