PLEASE ANSWER QUESTION QUICK

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?

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2