How do you evaluate the expression when x = 2, y = 7, z = 4 for 2z - 3?

2 Answers
Mar 27, 2018

Substitute #z# in.

Explanation:

You don’t need #x# and #y# because in your expression, #2x - 3#, there is no #x# and #y#. Just substitue #4# in for #z# in your expression and solve like any other expression.

Mar 27, 2018

5

Explanation:

Since the expression uses the variable #z#, substitute the number 4 in for #z#, as the instructions give us that number to use for #z#.

#2*4-3#

#8-3#

#5#