Algebraic expressions

Question

Jeremy bought 5 pencils for w dollars. Each pen costs 35 cents more than a pencil. Write an algebraic expression for each of the following in terms of w.

a. The cost in dollars of a pen

b. The number of pencils that Jeremy can buy with $20

Answer 1

Jeremy bought 5 pencils for w dollars. Each pen costs 35 cents more than a pencil. Write an algebraic expression for each of the following in terms of w.

a. The cost in dollars of a pen

b. The number of pencils that Jeremy can buy with $20

5 pencils for w dollars means (w/5) dollars per pencil.

a. Each pen, then, costs

P = $(w/5) + $0.35

b. number of pencils for $20

$20 / (w/5)

$20 * (5/w)

$100/w