CPM Homework Help : AC Problem 2-56

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Home > AC > Chapter 2 > Lesson 2.1.5 > Problem 2-56

2-56.

Evaluate each expression to find $y$ .

$y = 2 + 4.3x$ when $x = -6$
Step 1(a):
Substitute $-6$ in for $x$ .
$y = 2 + 4.3( -6 )$
Step 2(a):
Multiply and simplify.
$y = 2 + (-25.8)$
Answer (a):
$y = -23.8$

$y = (x - 3)^2$ when $x = 9$
Hint 1(b):
Follow the steps in part (a).
Hint 2(b):
Remember to use the correct Order of Operations.

$y = x - 2$ when $x = 3.5$
Hint (c):
Begin by substituting $3.5$ for $x$ in the equation.

$y = 5x - 4$ when $x = -2$
Hint (d):
Rewrite the equation as $y = 5(-2) - 4$ .
Answer (d):
$-14$

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