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Pearson Algebra 1 Common Core, 2011 View details

Chapter Review

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Exercise 15 Page 475

Substitute x = 2, y = - 3, and z = - 5

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Practice makes perfect

To evaluate the given expression for x = 2, y = - 3, and z = - 5, we should substitute these values into the expression and simplify as much as possible.

2x/y^2z^(- 1)

SubstituteValues

Substitute values

2( 2)/( -3)^2( -5)^(- 1)

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Simplify

FracToNegExponent

1/a^m=a^(- m)

2(2)(-5)^(-(-1))/(-3)^2

NegNeg

- (- a)=a

2(2)(-5)^1/(-3)^2