Answer: 80
Step-by-step explanation:
We can use the formula
, where
are the lengths of the diagonals.
By the distance formula,

So, the area is 
Answer:
78
Step-by-step explanation:
You would look at the middle number of all the numbers to find the median.
Hope this helps!
Multiply 9 books by 55% by doing
9 x .55 = 4.95
We can't have 4.95 books, though so it rounds down to 4 because you can't just add another .05.
I believe it would be y=-1/3x-2
Answer:
67
Step-by-step explanation:
its not a 90!!! tilt your screen.