Envision Math 2.0: Grade 6, Volume 1
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Review

Exercise 7 Page 169

Substitute 7 and 1 for n and z, respectively, in the given expression.

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Practice makes perfect
To evaluate the given expression for n=7, and z=1, we should substitute 7 and 1 for n and z, respectively, in the given expression and then simplify.
5z+3n-z^3
5( 1)+3( 7)- 1^3
5(1)+3(7)-1
5+21-1
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