### Home > INT1 > Chapter 2 > Lesson 2.1.2 > Problem2-20

2-20.

Evaluate the expressions below for the given values.

1. $1−2x+3y$ for $x=−2$ and $y=−5$

• Substitute the given values in for the correct variables.
Evaluate.

1. $5−(x−2)^2$ for $x=−1$

• Substitute the given value for the variable and evaluate.

1. $\frac { - 5 } { k + 1 }$ for $k=−1$

• Substitute the given value for the variable and evaluate.

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1. $\frac{1}{2}x+\frac{1}{3}y$ for $x=2$ and $y=5$

• Substitute the given values for each variable and evaluate.

$\frac{1}{2}\cdot 2+\frac{1}{3}\cdot 5$

$\quad1+\frac{5}{3}$

$\quad\frac{3}{3}+\frac{5}{3}$

$\quad\frac{8}{3}$