Answer:
20(E)
Step-by-step explanation:
Printing press R, S and T are working together at their respective constant rate.
They can do a job for 4 hours.
Let r, s and t be the time for printing press R, S and T to complete the job alone at their respective constant rate.
Rate of printing press R = 1/r
Rate of printing press S = 1/s
Rate of printing press T = 1/t
Rate = job / time
R + S + T = 4
1/r + 1/s + 1/t = 1/4
S + T = 5
1/s + 1/t = 1/5
Substitute 1/s + 1/t = 1/5 in the equation 1/r + 1/s + 1/t = 1/4
1/r + 1/5 = 1/4
1/r = 1/4 - 1/5
1/r = (5 - 4)/ 20
1/r = 1/20
r = 20 hours
It takes the printing press R 20 hours to complete the job alone
Answer:
$5100 would be $76.50
$4876 would be $73.14
$5215 would be $78.23
$6225 would be $93.38
$5235 would be $78.53
Step-by-step explanation:
To find commissions take your sale price and multiply it by your percentage and divide by 100
Answer: x^2-5x-84
Step-by-step explanation:
(x+7)(x-12)=
x*x+(-12*x)+7x+(-84)=
x^2-12x+7x-84=x^2-5x-84
Answer: -5
Step-by-step explanation:
First, if f(x) is equal to f(-2), then that means that in the equation, everywhere it says x, you sub in for -2. It would look like: f(-2)=(-2)^3-2(-2)-1 Put that into your calculator and you sound get -5.
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