For this case we have to:
Given the quadratic equation of the form:

The roots are given by:

If we have: 
We can rewrite it in the following way:

Where:

Where we have:



By definition: 




Thus, the roots are given by imaginary numbers:

Answer:

247.62 x 0.15 = 37.143
round to $37.14
I hope that helped :)
It's the third one and the last one are the only ones that make immediate sense.
Answer:
El número equivalente de 25/50 es 1/2
Step-by-step explanation:
F(g(7))= f(2×7+2)= f(16)= 4×16+21=85
Therefore: the answer is 85
Hope that helps!!