Help me pleaseee (10 points )
1 answer:
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2+20t-5t^2=12
5t^2-20t+10=0
t^2-4t+2=0 complete the square
t^2-4t=-2
t^2-4t+4=2
(t-2)^2=2
t-2=±
t=2±
t≈(0.586, 3.41)
5t^2-20t+10=0
t^2-4t+2=0 complete the square
t^2-4t=-2
t^2-4t+4=2
(t-2)^2=2
t-2=±
t=2±
t≈(0.586, 3.41)
The correct question as understood from the statement is:
Determine which equations have the same solution set as 2/3 – x + 1/6 = 6x by recognizing properties, rather than solving. Check all that apply.
a) 4 - 6x + 1 = 36x
b) 5/6 - x = 6x
c) 4 - x + 1 = 6x
d) 5/6 + x = 6x
e) 5 = 30x
f) 5 = 42x
Answer:
Options: a, b and f
Step-by-step explanation:
The given equation is:
Adding x to both sides, we get:
Option a) 4 - 6x + 1 = 36x
Moving 6x to the right hand side of the equation and simplifying the answer, would give us 5 = 42x, which is the same as the second last equation in above simplification. Thus this equation has the same roots.
Option b) 5/6 - x = 6x
Moving x to other side will give us the same equation as we got in 3rd last step of the above simplification. Thus this equation has the same roots.
Option c) 4 - x + 1 = 6x
Moving x to other side, and simplifying the result gives us an equation which does not match with the equations in above simplifications. So, this equation does not have the same root.
Option d) 5/6 + x = 6x
Moving x to other side, and simplifying the result gives us an equation which does not match with the equations in above simplifications. So, this equation does not have the same root.
Option e) 5 = 30x
This does not match with the second last step of the above simplification. So, this equation does not have the same root.
Option f) 5 = 42x
This equation matches with the second last step of the above simplification. Thus this equation has the same roots.
Answer:
18,646
Step-by-step explanation:
>you can graph the equation on a calculator and see that the minimum is at the point (250, 18646) , so the minimum unit cost is 18,646
>you can use the first derivative to find the minimum
c'(x) = (0.2x²-100x+31,146)' = .4x -100
.4x-100= 0 , so x= 250
c(x=250) = 0.2(250)² -100*250 +31,146 =18,646
