Answer:

Step-by-step explanation:
To avoid confusion, distribute that negative amongst all terms in the second set of parentheses:

** The above answer is written in reverse, which is the exact same result.
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Answer:
160 cm
Step-by-step explanation:
a square has 4 equal sides. if one of the sides is 40 cm, then all of the other sides are 40 cm as well. to get a perimeter, you add up the lengths of all the sides. if there are 4 sides of 40 cm, you multiply 40 by 4 to get 160, finally add the unit to get 160 cm.
Answer:
A
Step-by-step explanation:
it is like your hands hold your hand put to make a l shape that is 90⁰ and imaine that more opened out.