tammy and lia work in retail, in different shops. Tammy makes $7 per hour plus $4 for each item she sella, and Lie makes $10 per hour plus $3 for every item she sells. In an hour, how many items do they need to sell to make the same amount of money

Answers

Answer 1
So lets say y = The amount of money that's made and x = The number of hours worked. We need two equations. one for Tammy and one for Lia. Tammy's equation will be: y=7x+4 because she makes 7 dollars an hour plus 4 dollars for every item she sells. Lia's equation should be: y=10x+3 because she makes 10 dollars an hour plus 3 dollars for every item she sells. Now since we need to know when they will make the same amount of money, we put both the equations together to make 7x+4=10x+3. Now lets use the distributive property to solve that equation. 7x+4=10x+3     -4         -4       7x=10x-1     -10x -10x-3x=-1x=0.3 repeated)Now we plug x into Lia's equation and solve that.y=10([tex]\frac{1}{3}[/tex])+3y=3.33+3y=6.33Now we write our answer as an ordered pair: (0.33, 6.33) Buuuuuuuuuuuttt you can't have 0.333333333333 of an item so the final answer here would be NO SOLUTION.

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