CPM Homework Help : MC1 Problem 8-51

Evaluate the expressions below for the given values of the variables.

Hint:

For the expression below, you can substitute the values given for each variable and then simplify the expression.
It is important to remember that $2p$ really means two $p$ 's or $(2)(p)$ .
$2p + 8 \text{ for } p = 4$
$2(4) + 8 = 8 + 8 = 16$
And, remember to follow the Order of Operations!

$6j-3\ \text{ for }\ j=4$
Answer (a):
$21 \text{ for }j=4$

$\frac { 1 } { 2 } b + 5 \text { for } b = 14$
Hint (b):
If the variable is substituted here, the expression becomes
$\frac{1}{2}(14) + 5.$
can you simplify it now?
Answer (b):
$12$

$8 + 4 k \text { for } k = 3.5$
Hint (c):
$8 + 4 (3.5)$
Follow the Order of Operations.