Answer:
As the height increases, the temperature decreases.
It is decreasing 5°C per kilometer.
At the height 8 km the temperature is 0°.
Use the formula
(
b
2
)
2
in order to create a new term. Solve for
x
by using this term to complete the square.
Exact Form:
x
=
±
√
5
−
8
Decimal Form:
x
=
−
5.76393202
…
,
−
10.23606797
The answer is a i think but if u get it wrong im sorry
Write the word problem in algebraic form:
n2 -14 = 5n
Write as a quadratic:
n2 - 5n - 14 = 0
Factor:
(n+2)(n-7) = 0
Solve:
n+2 = 0 => n = -2
n-7 = 0 => n = 7
positive solution is 7. (14 less than 72 = 35 which is also 5 times 7)
