CPM Homework Help : INT1 Problem 2-20

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2-20.

Evaluate the expressions below for the given values.

$1−2x+3y$ for $x=−2$ and $y=−5$

Hint (a):
Substitute the given values in for the correct variables.
Evaluate.

$5−(x−2)^2$ for $x=−1$

Hint (b):
Substitute the given value for the variable and evaluate.

$\frac { - 5 } { k + 1 }$ for $k=−1$

Hint (c):
Substitute the given value for the variable and evaluate.
Answer (c):
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$\frac{1}{2}x+\frac{1}{3}y$ for $x=2$ and $y=5$

Hint (d):
Substitute the given values for each variable and evaluate.
Answer (d):
$\frac{1}{2}\cdot 2+\frac{1}{3}\cdot 5$
$\quad1+\frac{5}{3}$
$\quad\frac{3}{3}+\frac{5}{3}$
$\quad\frac{8}{3}$

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