Answer:
Time machine one = 3.56
Time machine two = 4.56
Step-by-step explanation:
Let machine 2 do the job in x hours
Let machine 1 do the job in x - 1 hours.
The general formula for this problem is
Time = A*B/(A + B)
Givens
Time = 2 hours
B = x hours alone
A = x - 1 hours alone.
#################
x *( x - 1)
======= = 2
(x + x - 1)
(x^2 - x)/(2x - 1) = 2
x^2 - x = 2(2x - 1)
x^2 - x = 4x - 2
x^2 - 5x + 2 = 0
a = 1
b = - 5
c = 2
This gives 2 roots
x = 4.56
x = 0.43
The second root will not work because when 1 is subtracted from 0.43 the time give will be minus, which won't work.
Time for machine 2 is 4.56
The time for machine 1 is 3.56
Check
(A * B)/(A + B) = 2
A = 4.56
B = 3.56
Time = 4.56*3.56/(4.56 + 3.56)
Time = 16.2336/(8.12)
Time = 1.9992
The rounding error in the check comes from the rounding error in the times.
Answer:
+10 units
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
(f - g)(x)
= f(x) - g(x)
= 3x - 2 - (2x + 1)
= 3x - 2 - 2x - 1 ← collect like terms
= x - 3 → A
The percentage of the pages in the manual without pictures is 0.92%.
The number of the pages in the manual without pictures is 0.01
<h3>
What are percentages?</h3>
Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred. It is a measure of frequency.
<h3>What is the percentage of the pages without pictures? </h3>
Percentage = (number of pages without pictures / total number of pages) x 100 = 0.92%
To learn more about percentages, please check: brainly.com/question/25764815
