Answer:
x<-1 so open circle going to the left
Step-by-step explanation:
which language is right
According to the profit equations given, it is found that since the number of days has to be a positive value, hence the viable answer is that they earn the same profit after 3 days, while the nonviable answer is -4.
<h3>What are the profit equations?</h3>
For the first friend, it is:

For the second, it is:
.
The system we solve to find when they earn the same profit is given by:



Which is a quadratic equation with coefficients a = 1, b = 1, c = -12. Hence:



The number of days has to be a positive value, hence the viable answer is that they earn the same profit after 3 days, while the nonviable answer is -4.
More can be learned about a system of equations at brainly.com/question/24342899
Answer:
5(x-3)(x+2)=0
Step-by-step explanation:
5x^2-30x=5
5x^2-30x-5=0
5(x^2-6x-1)=0
5(x-3)(x+2)=0
Answer:
c
Step-by-step explanation: