Answer:
1,583
Step-by-step explanation:
4,861 - 3278 = 1,583. All you have to do is subtract each amount of books from both months.
Four angles must add up to 360.
∠A+∠B+∠C+∠D=360
(5/2x+30)+(7/2x+40)+(9/2x+10)+(5/2x+20)=360
26/2x + 100 = 360
13x = 260
x = 20.
To solve for ∠C, plug x back in:
∠C = 9/2x+10 = 9/2*20+10 = 100
The relation between the width and the length is:
l = 3w + 1 --- (1) Perimeter = 2w + 2l --- (2) Put (1) in (2) » Perimeter = 2w + 2(3w+1) » Perimeter = 2w + 6w + 2 Perimeter = 8w +2
Yes this is a function because there are no repeating x values.