Answer:
Take the first two expressions (you can actually take any two expressions): $\frac{a+b-c}{c}=\frac{a-b+c}{b}$.
$\frac{a+b}{c}=\frac{a+c}{b}$
$ab+b^2=ac+c^2$
$a(b-c)+b^2-c^2=0$
$(a+b+c)(b-c)=0$
$\Rightarrow a+b+c=0$ OR $b=c$
The first solution gives us $x=\frac{(-c)(-a)(-b)}{abc}=-1$.
The second solution gives us $a=b=c$, and $x=\frac{8a^3}{a^3}=8$, which is not negative, so this solution doesn't work.
Therefore, $x=-1\Rightarrow\boxed{A}$.
Step-by-step explanation:
Simply will say
4000(3.5%) = 140 km^2
So each year will decrease by 140km^2
To find till 9th years it will be
4000-(140*9)=2740 km^2
Area after 9 years is 2740 km^2
Answer:
84
Step-by-step explanation:
70 divided by 10 = 7 this would be 10%
multiply that by 2 would = 14/ 20% + 70 = 84
Try mathaway.com, I am afraid if I type them all here you may not understand what I am saying
Answer:
Step-by-step explanation:
perp. -1/3
y + 4 = -1/3(x - 3)
y + 4 = -1/3x + 1
y = -1/3x - 3
