Anyone help? Solve part A. and B. for 18 points!

Given f(t) = 282 - 53 +1, determine the function value f(2). do not include f(z) = in your answer

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?