X^2-6x-27 = (x-9)(x+3), therefore (a) is the correct answer
Dr. Jean charges $48 per office visit.
To get the volume of water in gallons we proceed as follows:
volume=length*width*height
the dimension of the pool is:
50m by 25m by 1.5 m
thus the volume will be:
50×25×1.5
=1,875 m^3
but 1 m^3= 1000 liters
therefore:
1,875 m^3=(1875x1000)=1,875,000 liters
converting the above into gallons we get:
1 gallon= 3.786 L
therefore:
1,875,000 L=1,875,000/3.786 gallons
=495,245.6418 gallons
Answer:
The plans will cost the same for $260 minutes of calling. These minutes will cost $52.20
Step-by-step explanation:
Plan A: $8 + ($0.17/min)t
Plan B: $21 + ($0.12/min)t
Equate these, obtaining $8 + ($0.17/min)t = $21 + ($0.12/min)t, or:
($0.17/min)t - ($0.12/min)t = $13, or
($0.05/min)t = $13 , so t = 260 minutes. The plans will cost the same for $260 minutes of calling.
Find the cost in this situation: It is $21 + ($0.12/min)(260 min), or $52.20