How do you evaluate #a(b^x)# given a=4, b=1, x=7? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer Rachel Jun 6, 2017 4 Explanation: Let's substitute #a=4, b=1, x=7#: #a(b^x)# #4(1^7)# expand #1^7# #4(1 xx 1 xx 1 xx 1 xx 1 xx 1 xx 1 )# simplify #4(1)# #4 xx 1# gives us #4# 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 1076 views around the world You can reuse this answer Creative Commons License