Answer:
W = 4
Step-by-step explanation:
4/6 = 6/9
2/3 = 2/3
Painter cost when he use the roller.
40:8=5 hours for painting 40 m²
5+1/2 =5 1/2 where 1/2 is time needed for clean upthe roller
total cost is
(5 1/2)*11=55+11/2=60.5 dollars
Painter cost when he use spray gun
40:20=2 hours for painting 40 m²
2+1=3 time with the time needed for clean up the spray gun
total cost is
3*11+5*3=33+15=48 dollars
60.5-48=12.5 dollars
You save is 12 dollars 50 cents
Answer:
W'(x) = 
Here, the negative sign depicts the loss in weight
Step-by-step explanation:
Data provided in the question :
Function:
W(x) = 
Here,
R = 3,960 miles is the radius of the earth
w = Weight of the pilot = 120 lb
x is the distance from the center of the earth
Therefore,
Rate of change of weight
W'(x) = 
or
W'(x) = 
on substituting the respective values, we get
W'(x) = 
or
W'(x) = 
Here, the negative sign depicts the loss in weight
Answer:
19
Step-by-step explanation:
(x+2)/3 - (x+1)/5 = (x-3)/4 - 1
[5(x+2) - 3(x+1)]/15 = [(x-3) - 4]/4
(2x+7)/15 = (x-7)/4
4(2x+7) = 15(x-7)
8x+28 = 15x-105
7x = 133
x = 19