Combining the terms into one fraction, we have

If this converges to 0 as
, then the degree of the numerator must be smaller than the degree of the denominator.
To ensure this, take
and
. This eliminates the cubic and quadratic terms in the numerator, and we do have

Alternatively, we can compute the quotient and remainder of the rational expression.

Then in the limit, we have

Both terms on the left vanish if
and
.
Answer:
Just plug in 10^2-7.5^2
To get 43.75
Step-by-step explanation:
I hope you figure this out.
-7x+y=23
6x+7y=-4
y=7x+23
6x+7(7x+23)=-4
6x+49x+161=-4
55x+161-161=-4-161
55x/55=-165/55
x=-3
-7(-3)+y=23
21+y-21=23-21
y=2
15% is the answer for your problem
A=l*w
A=0.35 km*0.3=0.05 km^2
we transform in meters
0.05 km^=50m^2