Use the given function F(x)= 0.08x+4.02 to evaluate the values below a) f (12.6) =
b) f (-1.09) =
I am really stuck it would mean the world if you could help :)

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

What ia the sum if the first 7 terms of the geometric series