Determine when both options will have the same cost; also de

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Determine when both options will have the same cost; also de

Postby saeen on Tue Apr 08, 2014 4:19 am

Determine when both options will have the same cost; also determine what this cost will be.

The input variable 'x' represents the number of units produced, and the output variable f(x) represents the cost of this production.

Option A: f(x) = x + 5
Option B: f(x) 2x +3

Answer: units 2; cost: $7.00. Need to know the procedure.
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Re: Determine when both options will have the same cost; als

Postby little_dragon on Tue Apr 08, 2014 10:59 am

saeen wrote:Determine when both options will have the same cost; also determine what this cost will be.

The input variable 'x' represents the number of units produced, and the output variable f(x) represents the cost of this production.

Option A: f(x) = x + 5
Option B: f(x) 2x +3

Answer: units 2; cost: $7.00. Need to know the procedure.

i think they show procedure here: http://www.purplemath.com/modules/systlin1.htm
U have y=x+5, y=2x+3
substitute: x+5=2x+3
minus x from both sides, minus 3 from both side, get x
plug x into A or B to get y
:wave:
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