Answer:
$543.84
Step-by-step explanation:
Find the area of the room:
11*12 = 132ft^2
Multiply the area by the cost per square foot:
132*4.12 = 543.84 dollars
-21 and 63 are the possible values
x = 18
23
Angles x and 157 are linear pairs,
x + 157 = 180
x = 180 - 157
x = 23
...................................