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

Simple patterns, variables, the order of operations, simplification, evaluation, linear equations and graphs, etc.

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

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.
saeen

Posts: 1
Joined: Tue Apr 08, 2014 4:16 am

### Re: Determine when both options will have the same cost; als

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

little_dragon

Posts: 190
Joined: Mon Dec 08, 2008 5:18 pm