What is c in this equation "20=4c"

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585