First find half of the perimeter of the triangle: s = (a + b + c) / 2 = 11.095
Then the area is:
A = Square Root [11.095 (11.095 - 7.7)(11.095 - 5.2)(11.095 - 9.29)] = 20.01999895 or 20.02 square feet rounded to 2 decimal places.
1/2 - 3/8 = 4/8 - 3/8 = 1/8
you have to find a common denominator before you can subtract. in this case it is 8
Answer:
10 mystery books
Step-by-step explanation:
Animals:
Multiply the total number of books by the fraction of animal books
4/16*16
4 animal books
Adventure:
2 adventure books
Mystery:
Subtract the number of adventure and animal books from the total number of books
16-4-2
10
10 mystery books
Hope this helps! :)
