Answer:
Option C.
Step-by-step explanation:
We know that
f(t) = 1.5t + 50
represents the approximate population of trout in Sky Lake
And
g(t) = 0.1t^2 - 4t + 70
represents the approximate population of trout in Lake Cyan
The total trout population in the area is described as
f(t) + g(t)
f(t) + g(t) = [1.5t + 50] + [0.1t^2 - 4t + 70]
f(t) + g(t) = [1.5t + 50+ 0.1t^2 - 4t + 70]
f(t) + g(t) = [0.1t^2 -2.5t + 120]
f(t) + g(t) = 0.1t^2 -2.5t + 120
Option C.
x(x + 1) = 72
Expanding the brackets, we get:
x^{2}+x=72
Subtracting 72 from both sides, gives:
x^{2}+x-72=0
This is the required equation to be factored and solved .
Answer:c is your answer
Step-by-step explanation:90+90+38=218 then 360-218= 142