Answer: See below
Step-by-step explanation:
When you see that something is to the power of a negative number, it is another way of saying 1 over.

Answer:
90+15x+8x-2=180
Step-by-step explanation: If you solve this it should equal 4
Answer:
_|_____________________|_____________________|_
1/3 <u>2/3</u> 3/3
Step-by-step explanation:
draw a line:
____________________________________________
then divide the line by three's:
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then mark the first part 1/3
the second 2/3 and third 3/3:
_|_____________________|_____________________|_
1/3 2/3 3/3