Aused bookstore sells paperback fiction books in excellent condition for $2.50 and in fair condition for $0.50. write an expression for the cost of buying x excellent-condition paperbacks and f fair-condition payperbacks.

In the problem, we are given that:

x = number of excellent condition paper backs book that is bought

f = number of fair condition paper backs book that is bought

Also let us say that:

a = price of excellent condition paper backs book = $ 2.50

b = price of fair condition paper backs book = $ 0.50

Therefore the total cost of buying the books can be written as a function of x and f:

total cost = a * x + b * f

Substituting the values of a and b into the expression:

total cost = 2.50 x + 0.50 f

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63