(y-x)=2x

what is the value of x?

Which of the following is true for the relation f(x)=2x^2+1

What’s the range cuz i can’t find it?

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same