Answer:
64 for number 1. Not sure on number 2 sorry.
Step-by-step explanation:
+3 to both sides and you get s = -7
Answer:
Step-by-step explanation:
Given
Garden: 
One Bag: 
Requires
Determine the number of bags to cover the whole garden
This is calculated as thus;

Expand the numerator



Express 81 as 9²

Evaluate as difference of two squares


Hence, the number of bags is 
Answer:
a = 9
Step-by-step explanation:
a^2 = 41^2 - 40^2
a^2 = 1681-1600 = 81
a = 9
Answer:
skip counting by 0
Step-by-step explanation:
skipcount by 0 to get to 100 for the third column.