CPM Homework Help : CCA Problem A-57

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Home > CCA > Chapter A > Lesson A.1.5 > Problem A-57

A-57.

For each equation below, evaluate $y$ for the given value of $x$ . Homework Help ✎

$y=2+4.3x \text{ when }x=−6$
Step 1(a):
Substitute $−6$ in for $x$ . $y = 2 + 4.3\left(−6\right)$
Step 2(a):
Multiply and simplify.
$y = 2 + \left(−25.8\right)$
Answer (a):
$y = −23.8$

$y=(x−3)^2\text{ when }x=9$
Hint (b):
Follow the steps in part (a).
More Help (b):
Remember to use the Order of Operations.

$y = x − 2 \text{ when } x = 3.5$
Hint (c):
Begin by substituting $3.5$ for $x$ in the equation.

$y = 5x − 4 \text{ when } x = −2$
Hint (d):
Rewrite the equation as $y = 5\left(−2\right) − 4$ .
Answer (d):
$−14$

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