We can represent this problem with the following linear equation
y = 2x + 4
where
y: total cost
x: number of hours
the slope of the line is
m = 2
Which means that for every hour of audio tour guide they charge $ 2.
For "zero" hours (x = 0) a rental fee of $ 4 must be paid.
Answer:
9x^2 -4
Step-by-step explanation:
(3x+2) (3x-2)
FOIL
first: 3x*3x = 9x^2
outer: 3x*-2 = -6x
inner: 3x*2 = 6x
last: -2*2 = -4
Add together
9x^2 -6x+6x -4
9x^2 -4
Given: Sound Intensity ( I ) = 
We know, the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is 
⁻¹² W/m².
So, we can say, Reference sound intensity
= 10⁻¹² W/m².
We have formula for "sound intensity level LI in dB" when entering sound intensity.
LI = 10×log (I / Io) in dB
Plugging values of I and Io in formula.
LI = 10 × log (
)
LI = 10 × log (99000000)
= 10 × 7.99564
LI = 79.96 dB.
Therefore, 79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.
Answer:
greater than b
Step-by-step explanation:
We can use the transitive property for this answer. The transitive property states that if A=B, and B=C, A will always be equivalent to C. Similarly in this equation, -5 is greater than a, and a is greater than b, so -5 must be greater than b.
Answer:
x<3
Step-by-step explanation:
