Answer:
(3 + 19) - 12 = 3 + (19 - 12).
Step-by-step explanation:
The parentheses have migrated to the right whereas the order of the numbers and operations has stayed the same.
Answer:
l=48, w=20
Step-by-step explanation:
Let the width of the pool be w feet, then the length will be:

The area of the pool is 960 square feet.
This means that:

Expand and rewrite in standard form to get:




Factor to get:


We discard the negative value because magnitude is positive.
This means

Answer:
x = 80
Step-by-step explanation:
9+1=10 so x/8 must equal 10.
80/8 = 10 and subract by 9 = 1