If a test had 50 questions and you got a score of 58%, how many questions did you answer correctly?

What expression is equivalent to 1/2(2+3x-6)

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?