Answer:it’s a I think
Step-by-step explanation:
The answer to the first question is 30.
The independent variable (the one they want) is the # of hours worked, since that determines the price.
All the other answers contain information not included in the problem
4b²+20b+25=0
Divide everything by 4
b²+5b+ 6.25=0
use the quadratic formula
x= (-b+ or - √b²-4ac) /2a
x= (-5 + or - √5²-4*1*6.25) /2(1)
x= -5/2 so
in this case, b= -5/2
