What is the value of the expression #f^2+5# if f=3? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer smendyka Dec 9, 2016 #14# Explanation: Substitute #3# for #f# in the expression and then do the arithmetic to find the solution: #f^2 + 5 -> 3^2 + 5 -> 9 + 5 -> 14# Answer link Related questions How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ? What are variables? What are variable expressions? How do you write variable expressions? How do you evaluate variable expressions? How do you simplify the expression #3x-x+4#? How do you write a quotient of a number and 6 as an expression? How do you evaluate the expression #2x+1# for #x=1#? How do you write a product of a number and 2 as an expression? How do you write 5 less than 2 times a number as a variable expression? See all questions in Variable Expressions Impact of this question 1400 views around the world You can reuse this answer Creative Commons License