Answer:
b=-4a-52 or -b=4a+52
Step-by-step explanation:
because you can subtract 4a to the other side or you can subtract 52 to the other side then subtract b to get the second equation.
hope this helps :)
Answer: 
Step-by-step explanation:
The area of the entire circle is 
The area of the sector with the right angle is 
Subtracting these areas, we get
The answer would be 3.84.
If you need it rounded to the nearest tenth, then it's 3.8
If you need it to the nearest one, then it's 4.
Hope this helps! (:
I like to start by dividing the given number by 2, unless a larger factor is evident.
1386 = 2(693). It's pretty obvious that we can divide 693 by 3: 693=3(231).
Then we have 1386 = (2)(3)(231). Try the same procedure. Does 231 have any integer, prime factors? See how far you can take this factoring.
