Answer:

Step-by-step explanation:
We can substitute the given values of
,
, and
to find the value of this expression.


We know that <em>two negatives make a positive. </em>This means that
will be the same this as 

Adding a negative is the same as subtracting a positive.


Hope this helped!
Perpendicular lines are like a plus symbol,
but intersecting lines intersect in any way.
The unit rate would be:
4 dollars for 1 steak
1% = $4
$4 × 100 = $400
$4 × 18 = $72
Your answer is $400