We know that
Inverse Variation is a relationship between two variables in which the product is a constant
so
let
x------> a pitch of a musical instrument
y------> the wavelength
x*y=k
find the value of k
for x=220 hertz y=3 ft
x*y=k
220*3=k
k=660
for x=165 hertz y=4 ft
x*y=k
165*4=660
k=660
the answer part a) is
the type of variation between pitch and wavelength is an inverse variation
part b) What is the pitch when the wavelength is 5 feet?
x=?
y=5 ft
k=660
x*y=k------> solve for x
x=k/y----------> x=660/5-----> x=132 hertz
the answer Part b) is
132 hertz
I am not sure what the six-step method looks looks like but if you use x gallons of 60% solution
the amount of antifreeze in the mixture = 0.6x + 8 gallons
This needs to be 50% of the total quantity in the mixture, x + 80
0.6x + 8 = 0.5(x + 80)
0.6x + 8 = 0.5x + 40
0.6 - 0.5 = 40 - 8
0.1x = 32
x = 32 x 10 = 320 gallons
in simple interest, I=PRT
I=interest
P=principal
R=rate in decimal form
T=time in years usually, but could be months or weeks, dunno
I'm assuming that the 8.75 is 8.75% or 0.0875 in decimal
so
I=PRT
we know I, P, and R, so solve for T
I=PRT, divide both sides by PR
I/(PR)=T
subsitute
I=5425.00, P=15000, R=0.0875
I/(PR)=5425.00/(15000*0.0857)=4.133333333=T
so the time is 4.13333333 units of time
Answer: -1
Step-by-step explanation:
To find the slope fo the line with the given points, you use the formula 
.
Now, we know that the slope is -1.
Answer:
f. for the x values I think its -1 & 5
